I ordered gig speed from comcast, but cant get the pc to run it. Router and Modem are both gig and comcast tested with their XMT and speed is gig from the modem.

What type of cable are you using with pc to router/modem ? please let us know also this. What exact speed are you getting?

docis 3.1 netgear, Amplifi router.  Getting btwn 50-300 mpbs.

When you are testing are you using Comcast based speed test.

Note workstation commonly pergorm at 25-30% of max spec.

Best way to test throughput is by having multiple systems, devices try to pull as much SATA as possible, I.e. Multiple tsv, devices using Netflix pulling different movies....


The difficulty you gave unmanaged resources such that you can not monitor bandwidth consumption.

That router appears to be Gigabit capable
https://www.netgear.com/landings/docsis-3.1/

There is an accelerator process for the onboard NIC.
https://ieeexplore.ieee.org/document/6299068

Does that help?

Arnold, I'm sorry but I don't understand your post. Could you describe it a different way maybe please?

John I don't have a login to view that paper and there's very little information on the link

My apologies. I thought you might. I do not either.  I could not find anything else to speed up the onboard NIC and you cannot (apparently) install another one.

Speediest from a workstation or a single system is limited by the source from which the sample SATA is pulled and the limits on the local system.

Multiple systems behind your rputer trying to pull as much information from one or multiple sources could demonstrate the capacity .....

I.e. If you have three systems at the same time each reports 300mbs ........
..

If you have just one system (the one above), use Edge to run:  http://www.speedtest.net/

With all other systems disconnected, what do you achieve?

Is there anyone out there who knows how to overcome this odd low speed issue?

Do you have another computer to test with (only one at a time)

John, Im sorry... could we allow some other techs take a crack please?

Arnold, Im sorry... I still dont really understand your comments.  :(

Are you using Cat5e or Cat6 cable between the PC and the Router?
And between modem and router?
Have you verified that the NIC on your motherboard is set to 1000Mbps Full Duplex?
Could you please post make and model of your router?

I contacted the support for the Amplifi Router and this is what they said...
      
Sheldon V (AmpliFi)

Oct 7, 18:52 PDT

Hi Mark,

AmpliFi is a Gigabit router, if the modem is able to pass the gigabit speed then the AmpliFi router will also provide gigabit connection.

Hope that's helpful. If you have any other questions, please let us know!

Thanks!

Hi Cris,
The cables are all 5e or 6.
Full Duplex is on.
Router is the Amplifi Mesh system

the test to achieve max throughput (90% of gig) is not possible.
Using multiple systems at the same time you can test cumulatively
I.e three tests running at the same time pulling 300mbs each, approximate your 1gig .....


There must have been a reason you signed up?

If you only have one system gig just doubts nice, but is totally unnecessary

Unfortunately a water, or other similar analogy would not work as flow, pressure.

The point being no matter how large the connection to your udp you get, the limits are often imposed on the sending side. I.e. There is no place that would allocate 1gig to the stream to you which has to have the path maxes.


You could try usin three browser windows and trigger the three tests as close to ...

There are tools that include threading, etc. tests that you can try to max out your connection.

what issues did you have with the10-20, 40-60 MB connection that you went to a gig?

The gig is a sales tactic (selling point)

Not all routers come with GIG WAN PORTS
Nothing I could find on the Amplifi Website would tell me for sure

But my bet is on your router....

Have you tried plugging ethernet cable directly to your modem??

Are you running Windows 10?   you should download and run the Speedtest App from the Windows Store

I disagree with Arnold...the whole purpose of the speedtest apps is to keep "loading" to test max speed

I had to switch routers a few times to get the speed from Charter that I was supposed to be getting..

After I switched to Full Dup, Im getting only about 100mpbs

I contacted Amplifi a couple times, and they assure me that this is gig capable.
Yes, you get the same results when wired right to the modem.

Reposting OP for clarification...

I ordered gig speed from comcast, but cant get the pc to run it.  Router and Modem are both gig and comcast tested with their XMT and speed is gig from the modem.
So I went down to Microcenter and got another nic, but it wont install.  I AM getting the right upload speed, ~40mbps.  But the download wont make it past 200 or 300.
Any assistance is appreciated.
Thank you,
Mark88

System board is GA-P55A-UD3R rev 2.  16g ram, 2.7 gig cpu, GBE integrated nic.  Windows 10
Operating System
      Windows 10 Pro 64-bit
CPU
      Intel Core i5 750 @ 2.67GHz      59 °C
      Lynnfield 45nm Technology
RAM
      16.0GB Dual-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
      Gigabyte Technology Co. Ltd. P55-UD3R (Socket 1156)      31 °C
Graphics
      Acer S232HL (1920x1080@60Hz)
      X221W (1680x1050@59Hz)
      2047MB NVIDIA GeForce GTX 560 (EVGA)      32 °C
Storage
      698GB Western Digital WDC WD7501AALS-00J7B0 ATA Device (SATA)      34 °C
Optical Drives
      HL-DT-ST DVDRAM GH24NSB0 ATA Device
      Optiarc DVD RW AD-7240S ATA Device
Audio
      High Definition Audio Device
The slot I have the card in, is a "pciex 4" slot.  It's the blue one.  The white pcie wont take the card.

I went down to Microcenter and got another nic, but it wont install.  I AM getting the right upload speed, ~40mbps.  But the download wont make it past 200 or 300. The slot I have the card in, is a "pciex 4" slot.  It's the blue one.  The white pcie wont take the card.

This Netgear CM1000 is the ONLY router microcenter carries that's authorized for Comcast gig connections.

I went to the windows store and downloaded the speedtest and I got this error.

Cris, can you help me figure out why the pcie nic I bought 2 hours ago wont install either?  It doesnt even show up in DManager

what do you hope to confirm? That your max through put is 1Gig?
Because your feed from Comcast to you is one gig, does not mean that you can using a single system achieve the max.

I.e. You're tied an eighteen wheeler, but you only have 500 pounds to move.

You seem to be overpaying for your needs/utilization.

Ok Arnold, let's give someone else a chance.

Arnold, it is definitely possible to test 1GbE circuits.

I test a few 500Mbps and 1GbE circuits that are WAN and DIA at work.

For the DIA circuits, I would climb steadily up to 800, 900, 950, 980, 990, 999, then BSOD as I hit 1 gig.  After that, we put it into production, and never got higher than 850-900Mbps on a single machine, because there was always something talking to something.

For WAN, we can get 500-520Mbps before policers would kick in.  For DIA, they could clamp down pretty quick at 500Mbps.

This is with laptop computers with Core i5 with Win7, and Core i7 with Win10.

The speed test servers will often drop the traffic and not yield a full 1-gig connection.

SpeedTest app on Win10 is better than the web site.

Alegarth, You are testing end to end when you control both ends.
Testing
Internet cloud <=>Comcast <=> gig feed

See if Comcast offers a vps/dedicated server.
Buy for one month, get a gig feed for it. Setup a 1 go file
And pull it.
Then compute the size of file/duration of transfer it will answer your question.

Check your pc first. Connect second device to router and transfer data between them and confirm can get decent speed.... Will never get full speed through ethernet and you have limiting factor of drives too if you are downloading files as well as the source limiting things.

We have gigabit internet for about 750 clients at one site and speed test from there does give pretty high results as does running them on ISP and Azure based servers so the speed test sites will report the faster speeds though they seem less consistent for higher speeds.

Have you tried finding a torrent type download with Vuze say?

Comcast only cares when you are connected directly to their device and using their own speedtest site, which is inherently biased (totally on their network).

Routers tend to cause a reduction in max speed. But also, I notice you improved your speed by locking your computer into 1 gbps full duplex. What were you getting in terms of lan connection speed and duplex before you made that change? 100 mbps half?

If a new PCIe NIC is not seen by your computer, either it is not in a supported slot, the slot is faulty, or the NIC is faulty.

If you do not get your expected speed on a speed test, first of all test performance on your local LAN with iperf to another device on the your local LAN.

The next test should be across your router again using iperf, with one of your testing computers configured with a public IP address (but not connected to the Internet).

https://iperf.fr/iperf-download.php

The write  speed to HDD may also play a part.
Its downloading to the HDD.
HDD sata or SSD?

Geez. Comments on this thread are very long, so I may repeats some people above.

Since this question is still open, I'm guessing you still have problems.

To test speed...

1) Connect your PC to your router with an Ethernet cable. This is true speed test.

2) Then, it appear your WiFi hub supports 802.11ac, so your Wifi will likely run at 1G, if you connect your WiFi hub to your router via an Ethernet cable.

3) Since your only seeing 300mbps rather than 1G (your WiFi shows to support 1750mbps so you should see 1G easy), this can mean several things.

a) Most likely, your PC only supports up to 802.11n (300mbps). The only fix for this is to purchase a 1G+ USB WiFi transceiver.

b) Most WiFi hubs provide completely different SSIDs (network names) for 802.11n + 802.11ac networks, so be sure you've actually configured an 802.11ac network on your WiFi hub. I normally name my networks...

foo (low speed)
foo 5Ghz (high speed)

c) If your PC has an 802.11ac transceiver, make sure you're actually connected to your high speed 802.11ac you configured + not to your low speed networks.

d) You must do all this testing with your PC right next to your WiFi hub to verify speed. Many PC 802.11ac transceivers will automatically downgrade  802.11ac to 802.11n if signal strength is low.

David:

To test speed...

1) Connect your PC to your router with an Ethernet cable. This is true speed test.  ALREADY DID THAT.  NO CHANGE

2) Then, it appear your WiFi hub supports 802.11ac, so your Wifi will likely run at 1G, if you connect your WiFi hub to your router via an Ethernet cable.  IM ONLY POSTING RE: MY HARDWIRED DESKTOP.  NOT WIFI

3) Since your only seeing 300mbps rather than 1G (your WiFi shows to support 1750mbps so you should see 1G easy), this can mean several things.

a) Most likely, your PC only supports up to 802.11n (300mbps). The only fix for this is to purchase a 1G+ USB WiFi transceiver.  BOARD IS https://www.gigabyte.com/Motherboard/GA-P55A-UD3R-rev-20#ov AND SAYS IT CAN PROCESS A GIG

b) Most WiFi hubs provide completely different SSIDs (network names) for 802.11n + 802.11ac networks, so be sure you've actually configured an 802.11ac network on your WiFi hub. I normally name my networks...  SEE ABOVE.  THIS *ROUTER* IS A GIG ROUTER

foo (low speed)
foo 5Ghz (high speed)

c) If your PC has an 802.11ac transceiver, make sure you're actually connected to your high speed 802.11ac you configured + not to your low speed networks.  THIS IS A DESKTOP.  THE NIC IS INTEGRATED AND I INSTALLED A 2NDARY NIC TO TEST BUT WINDOWS ISNT SEEING IT

d) You must do all this testing with your PC right next to your WiFi hub to verify speed. Many PC 802.11ac transceivers will automatically downgrade  802.11ac to 802.11n if signal strength is low. DESKTOP DOES NOT HAVE A WIRELESS CARD IN IT

Steve Knight
Check your pc first. Connect second device to router and transfer data between them and confirm can get decent speed.... Will never get full speed through ethernet and you have limiting factor of drives too if you are downloading files as well as the source limiting things.
- ANYTHING I CONNECT HAS THE SAME RESULT

We have gigabit internet for about 750 clients at one site and speed test from there does give pretty high results as does running them on ISP and Azure based servers so the speed test sites will report the faster speeds though they seem less consistent for higher speeds.

Have you tried finding a torrent type download with Vuze say? NO.  IM JUST TESTING THE SPEED ON OOKLA ETC...

Merete

The write  speed to HDD may also play a part.
Its downloading to the HDD.
HDD sata or SSD?  HDD, BUT I TESTED THIS ON MY WORK LAPTOP TOO AND NO CHANGE

ArneLovius

If a new PCIe NIC is not seen by your computer, either it is not in a supported slot, the slot is faulty, or the NIC is faulty. ITS IN PCI3 1.  CARD IS A  X1 PCI EX COPPER ADAPTER INTEL RUNS FROM  TEN TO A THOUSAND

If you do not get your expected speed on a speed test, first of all test performance on your local LAN with iperf to another device on the your local LAN. NOT SURE WHAT THIS IS.  COMCAST TESTED THE SPEED TO THE MODEM 5 TIMES WHILE IN MY HOUSE W/THEIR XMT DEVICE.  IT'S GETTING THE GIG.

The next test should be across your router again using iperf, with one of your testing computers configured with a public IP address (but not connected to the Internet). NOT SURE WHAT THIS IS

masnrock

Routers tend to cause a reduction in max speed. But also, I notice you improved your speed by locking your computer into 1 gbps full duplex. What were you getting in terms of lan connection speed and duplex before you made that change? 100 mbps half?  FULL DUPLEX SEEMED TO REDUCE THE SPEED AS I MENTIONED ABOVE.  I CANNOT GET THE SPEED TO GO ABOVE 50-250

Ok forget all the other worries. Try test between two machines connected to your router with cable using iperf as has been suggested by multiple people  Depending upon that you can decide if bottle neck is pc or NIC before suspecting router or net. connection.

Unless you download multiple things from different places potentially on multiple devices or things like torrents dragging data from different places it is not relevant to just kick off a speed test site or try a download of iso from Microsoft etc. As there will be various throttling in place at ISP or download source etc.

Oh and duplex and NIC settings, it should be gigabit and full duplex but leave it automatic to work properly with your switch / router ports.  Flow control settings also make difference but should be left to automatic settings.

I provided a link to iperf...

I know but I've never used that before and I have no idea what it is or how to install it or run it

Ookla with Speedtest.net, lately, is not consistent.  We see far slower speeds...in the range of 250-450Mbps, even on an empty gig fiber connection.

Try dslreports.com speed test.  They have one for fiber.  It's strangely inaccurate on the upstream.  It sometimes show 1.2Gbps on a 1 gig circuit.

You can also try speedtest.att.com. It may also show overly high upstream, but it sounds like you have asymmetric service anyway.  I have a full 1Gbps/1Gbps, and it measured between 900/800 to 950/1200 when it was new (not in production).

It all depends on the routes and gear in the middle, and if your test computer happens to be doing anything else like checking for an update or loading an ad on a tab in the background.

As has been said above iperf is simple enough to install on pretty well anything from the links given above and will prove your transfer speed between two devices on lan.

Try speed test at exactly same time from laptop and desktop too will show if greater than only 1

when I installed it I didn't get a run choice or anything like that. Is it an executable that I have to go find and run? Doesn't need any configuration?

speedtest.att.com shows same results as everyone else

All that gig speed internet assures you is that the connection from your modem to Comcast CAN run at up to 1000 mbps. In reality, you will never get 1000 mbps, because there is overhead and other system issues that will slow it down some.

Also, Comcast connections are shared connections, so only in ideal conditions will you get anywhere close to gig speed. Typically, if this connection you have is a cable modem. you share your cable "neighborhood" (node) with approximately 480 other homes. They also use bandwidth, and depending on how much bandwidth Comcast has allocated to the node will determine how fast things run. And note that if you have business customers in your node, they get speed priority over a consumer connection, which could also slow down your speed. It is why they use the words "up to" when describing the speed.

Also note that a second limitation will be the head end cable modem device to the backbone of the internet. Obviously that connection is not unlimited, and that connection is shared by a LOT of nodes as this is where all the neighborhood nodes come together. So you are sharing that backbone bandwidth with a lot of other people.

You are also very unlikely to ever get a connection to any other site that offers that much speed. Where you will see a benefit is that your TOTAL bandwidth can get close to 1 Gbps of bandwidth, so multiple users will not see (as much) a slow down when someone else is using a lot of bandwidth.

So I have 1000Mbps ( 1gb) speed from AT&T. What I have discovered is that while my connection is fast, most of the internet is slow. Do not expect most things to run anywhere near close to that speed.  BUT, I can now stream an HD movie, download files, listen to music, watch TV all at the same time, with little to no slowdown on each.

When doing a speed test, do not expect to ever see full speed, especially if you use a test outside Comcast's network. It simply will not show you 1 Gbps ever. If you use Comcast's speed test, you should see better results,  but still do not expect to see full speed.

My router shows a link speed of 975 mbps (on average), but it varies (see image below). When I do an AT&T speed test from the computer, the best I have ever seen is about 700 Mbps. Like you, I have a Gb gateway (which I use as a router for most my connections), which I used a SHORT CAT-6 cable to a 1gb ethernet port on fast laptop. Typically, the best I see is around 600 Mbps on any machine wired.


So everything said so far is all good information. BUT, no matter what you do, do not expect Gb speed to one machine. Know that there is a lot of bandwidth, and multiple uses will all work well.

I have an ARRIS SURFboard SB8200 DOCSIS 3.1 32x8 Cable Modem, Router is a Netgear Nighthawk (R9000) with two internet connections (Compatible with DOCSIS 3.1), Standard, and Gigabit inputs, my average speed on downloads are only as fast as the site I am downloading from. But on a speed test, it's showing 964MB/s. You're PC/Laptop should have a Nic least 802.11 A/C, or at least that is what I have on my Desktop


You may want to see if there is a firmware update for your Router, that may negotiate the Gigabit Speeds.

Everything is updated and is new gig equipment.  There's GOT to be a way to get over 200

wlennon, what speed test did you get this result from? Is that an  internal link speed test, or Speedtest across the internet to a speedtest website? I must say I am surprised, as I have never seen anyone get that speed across the net in a web browser to a web speed test.  I'd love to know more about your set up?  

Are you also on Comcast Gig? Are you in a fairly new neighborhood? Are you using a Business Gig, or the consumer version? Have you done anything to your machine to minimize anything else taking bandwidth?

Just curious how you got that result.

Thanks

I am going to make an assumption that getting more speed is not a computer issue at the moment.

Mark, how long has the Gig Comcast been installed.

When I used Comcast in the past, it took a few days from them to provision the modem to run at full speed.  You might contact Comcast and ask them to check again that the modem is properly configured.

You might also be able to check this yourself. Typically Comcast modems are at 192.168.0.1, 192.168.1.1 or 192.168.100.1 (some use 10.1.10.1) and usually display a statistics screen in one of their menus to show link speed.  You can't change much, but you can see if all channels are connecting properly, and that the modem is not showing an errors.

As one of the early engineers of cable modem systems too many years ago, the problem you are getting sounds to me like one or more available channels for the modem are not being acquired and used. Assuming the system still uses 6 MHz channels and is now using QAM 256 on each channel, that results in 42.88 Mbit/s per 6 MHz channel (after overhead) as the max speed per channel. So you need 24 channels connected to the modem to get full speed. That, I believe, is the maximum number of channels Comcast allocates on a node per modem. BUT, if some of those channels are not connecting, the total speed is going to be much slower.

If you can connect to the modem directly, you should be able to see a log and channel map, and IF there are any errors.  You might have to poke around with the menu options the modem offers, but look for data errors ad channel errors.

Also, if the comcast cable in your area is noisy and has a lot of ingress noise from outside sources (like a nearby local TV or broadcast station) this too can slow things down as more noise means less throughput.  It is possible that in your location, they simply cannot offer this much speed.

I am not sure any of this is the issue, and a Comcast tech can come to your area with test equipment to see if the signal is clean, and all channels are working properly. If they confirm that, and that your modem is working properly, then it is after the Comcast modem and somewhere between their Ethernet port, and your machine.

I'm not sure either. I went from the modem right to the computer and I have the same issue. I've called Comcast many many times over the past two weeks when we ordered it and they assure me that it's provision properly and the text came out and test it here in the house and found it was also configured properly

we are in a metro area in Denver. There are people around me getting gig speed and probably getting it close to eight or nine hundred instead of 100 to 200.

in the original post I put a lot of technical information about my setup

Mark, I am going to suggest you get a friend to bring over a different computer to do the speed test. If that computer tests well, then we know it is your computer or the cable. If that computer also tests badly, then it is time to be more assertive with Comcast.  We need a second test to try and isolate where the problem is.

And if you can get into the status screen of the cable modem, I would love to see some images of the channel maps.

Thanks

I tried a couple laptops like my work laptop. it has 32 gig ram etc.  super fast Engineering laptop.   I thought it did the same thing as the desktop but maybe I should bring it home tomorrow night.  Comcast's been over here numerous times.  I don't know how to be more assertive w\them.

do u have a link for the modem logon procedure?

You might have to ask the problem be escalated to tier two support.

BUT, be sure you have exhausted all possible tests. If the other machine shows the same speed, next change the internet cable and test again. I just want to be sure we eliminate everything other than the modem. Do your tests connected directly to the cable modem as to eliminate any other possibilities of a slow down.  Try to use Comcast's speed test page (http://speedtest.xfinity.com/) as well as a few others as well just to be sure it is not the test site that is the problem.

As I said before, I do not expect you to get to really close to 1 Gb, but you should get a lot closer than you are now, at least 700 mbps.

Report back. thanks.

You can probably find it by googling the model of your modem. Post it here and I will see what I can find.

tried tons of different cables and so does Comcast when they were here

Modem is Netgear CM1000.  Owen, this looks pretty easy... https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router

Well good to know (I think) that the method for logging into a cable modem has not changed since 1996!  SIGH!

That modem has 32 downstream and 8 upstream channels, so it should easily reach Gb speeds.

I found a user's manual for that modem: http://www.downloads.netgear.com/files/GDC/CM1000/CM1000_UM_EN.pdf



To view the status of the cable modem initialization:
1. Launch a web browser from a computer that is attached with an Ethernet cable to the
cable modem or from a computer that is connected to a WiFi router that is attached with an
Ethernet cable to the cable modem.
2. Enter http://192.168.100.1.
A login window opens.
3. Enter the cable modem user name and password.
The user name is admin. The default password is password. The user name and
password are case-sensitive.
The BASIC Home page displays
4. Select Cable Connection.
The Cable Connection page displays.
The Startup Procedure section displays the initialization progress. The Downstream
Bonded Channels section displays the status of each downstream channel.
5. To see the Upstream Bonded Channels section and system time, scroll down.

Downstream is to you. Now what I do not know is if they bond all 24 channels at the same time, or they simply add them as needed. So I am not sure this will tell me what I need to now. But if you see any errors there, that would be worth noting.

Might also be worth looking at the logs and seeing if it is throwing any serious errors:

View and Clear Event Logs
Event logs capture important cable modem events.
 To view and clear the event logs:
1. Launch a web browser from a computer that is attached with an Ethernet cable to the
cable modem or from a computer that is connected to a WiFi router that is attached with an
Ethernet cable to the cable modem.
2. Enter http://192.168.100.1.
A login window opens.
3. Enter the cable modem user name and password.
The user name is admin. The default password is password. The user name and
password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Administration > Event Log.
The Event Log page displays the following information:
• Time. The time the event log entry was recorded.
The correct time displays only after the cable modem successfully connects to the
cable Internet provider’s network.
• Priority. The severity of the event log entry.
• Description. A description of the event log entry.
5. To refresh the log page, click the Refresh button.
6. To clear the log entries, click the Clear Log button.

Maybe we will see something here.

Dynamic Range Window violation
2018-10-29, 12:48:56      Warning (5)      RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM
2018-10-29, 12:31:50      Warning (5)      Dynamic Range Window violation
2018-10-29, 12:31:50      Warning (5)      RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-;
2018-10-28, 10:58:44      Warning (5)      Dynamic Range Window violation
2018-10-28, 10:58:44      Warning (5)      RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM
2018-10-28, 10:51:08      Warning (5)      Dynamic Range Window violation
2018-10-28, 10:51:08      Warning (5)      RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-
2018-10-28, 10:45:26      Warning (5)      Dynamic Range Window violation
2018-10-28, 10:45:26      Warning (5)      RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-
Time Not Established      Notice (6)      Honoring MDD; IP provisioning mode = IPv6
Time Not Established      Critical (3)      No Ranging Response received - T3 time-out;
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
Time Not Established      Critical (3)      No Ranging Response received - T3 time-out;
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM
2018-10-27, 16:45:22      Critical (3)      Resetting the cable modem due to docsDevResetNow
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-27, 16:32:25      Critical (3)      Resetting the cable modem due to docsDevResetNow
2018-10-27, 15:50:41      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-27, 15:50:36      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-
2018-10-27, 15:50:05      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
2018-10-27, 15:49:26      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-;
2018-10-27, 15:49:26      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM
2018-10-27, 15:49:09      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-27, 15:49:09      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-
2018-10-27, 15:46:50      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM
2018-10-27, 15:46:44      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-27, 15:46:42      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
Time Not Established      Critical (3)      No Ranging Response received - T3 time-out;CM-
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-26, 14:56:01      Critical (3)      Resetting the cable modem due to docsDevResetNow
Time Not Established      Critical (3)      No Ranging Response received - T3 time-out;CM-
Time Not Established      Critical (3)      SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-
2018-10-26, 12:38:36      Critical (3)      Resetting the cable modem due to docsDevResetNow
2018-10-26, 12:37:24      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-
2018-10-26, 12:37:22      Critical (3)      No Ranging Response received - T3 time-out;CM-
2018-10-26, 12:37:21      Critical (3)      No Ranging Response received - T3 time-out;CM-
2018-10-26, 12:37:20      Critical (3)      Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;

Ok, for the most part, "Dynamic Range Window violation" can be ignored.  But the time-outs do concern me. The first error is a warning that the modem is cranking up power to get its signal received and is above the normal. It can be ignored.

"Resetting the cable modem due to docsDevResetNow" is a message that the head end reset the modem. That was done by Comcast or the Comcast cable head end. The reason is why so many of them? Might be a connection problem, which seems likely.

Most of the rest of the errors seem to indicate to me that there is a power problem, and maybe signal issues because of your distance from the node possibly.  Especially things like "Failed to acquire QAM/QPSK symbol timing;CM-" means that some channels are not connecting as I suspected, or are connecting and causing errors trying to set up.

When I see all these errors " No Ranging Response received - T3 time-out;" if the Cable Modem Head End can't hear your modem reliably it will cause the modem to re-boot spontaneously in an attempt at re-ranging to try to establish a better connection. Since you are getting a lot of reboots, it might indicate that your modem is having trouble talking to the head end, trying to recover from errors, and that is really dropping bandwidth.

Comcast should know if this is a problem, and should be able to test for it. But either the modem is faulty (unlikely) or there is a problem with the node (also unlikely but it happens, and maybe you are the first to try Gig speeds and now see it) or you are too far from the node, or the cables between your house and the node are faulty.

Silly as this sounds, go look at the Comcast cable that leaves your house and goes to the connection point (if you can) and see if it is frayed or damaged.

But you really need to get escalated up in service to like a Tier-3 tech that can look at your logs and your modem and analyze those issues.   Some of them are normal, some are not. But so many has me wondering what is going on.

should I test the power in the apartment?

as Owen in great detail explained the situation

The power related issue deals with the signal power level versus electrical power.
https://community.netgear.com/t5/Cable-Modems-Routers/CM1000-RNG-RSP-Issues/td-p/1399592

Did you buy your own cable modem, if so double check with Comcast about the configuration, I.e. How many up/down channels shoukd your cable modem attempt to setup/establish

but I need to know if I should test the outlet power too?

Comcast said that the boot file is good and everything else is good from their perspective

Arnold, sorry btw, this CM1000 is the ONLY modem that Microcenter sells thats authorized for Comcast gig.  Comcast's modem did the same thing as this one does.

I think Owen said the CM 1000 has plenty of channels too

Availability of channels is one thing the number of channels that should setup/were provisioned is another.
 If you configured the modem, the number of channels you specify if differ from the number of channels Comcast provisions will lead to the mismatch
Provide Comcast tech, try to escalate to a higher level.  Support  first, the logs you included and have them confirm the number of channels provisioned on their end for the feed.
Presumably their tech came out to check the signal level by directly attaching their test equipment to the coax cable. Outside and inside to confirm signal levels.

The detail on the modem often indicates status of each upload/download channel. On logon into the cable modem see how many on each side are reflected as sync up

Their equipment is setup to retrieve the config, (boot and config) from their DHCP/bootp
Yours might not be loading the config and setup based on their info.
Make sure to remind them that you purchased your own X able modem and not renting/leading one of theirs.

Power (electrical) manifest differently on equipment connected to it.
If you have your computer powered from the same outlet and it has stats such as voltage/power consumption.

Electrical power related manifest differently.

I.e. If you power level slightly above the -10% of power, instead of 120 is near 108v, if the power flactuates below this level let's say to 105/100 it will not be reflected in the log, commonly the device will reset, especially a computer with low power manifest in a drop of voltage in the 3.3 v memory related feed.  It will be detected as a memory fault, panicking the processor.

Thanks Arnold.  Comcast limits to 24 channels per modem, and yours can accept 32, so that part is good.

Your AC power is not a problem. Modems turn down transmit power to minimum to help with interference. But the further you ate from the node where all houses connect to the fiber, the higher the transmit power needed. But if either the modem can not get its power high enough (faulty) or the cable to the node is bad (noise) or you are just too far away, things will slow down.

Since you bought your modem, you can ask Comcast to try their modem to see if it works better. Or consider returning the modem as faulty and try a replacement as well.

But my guess is something wrong with the cable.

the boot file is correct.  been reviewed many times

I tried Comcast's modem-router thing

Ive tried many cables.

Did a tech come out to test signal levels/channels?
Outside/inside?

Given you say they confirmed the setup, and you experienced the same issues with their modem connected, they seemingly did not properly review the situation.
When attaching thir modem they should see the instability as it triggers repeated requests from your side to their equipment.

Did this setup exist(your Comcast as a provider) deals with whether the line from their box to your location..

The other issue since you mentioned an apartment whether this node is oversubscribed.
Though the channels shoukd setup but the transport might be impacted.

You mentioned, or at least I think you did, that another person has a similar setup and has no issue.

Trying their on your life, or yours on theirs .......

Depending on the duration when you signed up till now to get them ...

Try this, bring your modem into their offices and have them test out whether it will setup and transfer at "1gig" ....

five checks have been out here and said there's no problem anywhere and they don't know what the problem is. They've checked the lines to the pillar the pillar to the street everything in the house and everywhere else and all the connectors. They said I'm connected not to a splitter at the pillar but I have my own connection directly to the the board at the pillar

That is unlikely based on what you are reporting.

Unfortunately the weather in your kneck of the woods might not be condisive to try (depending distance to connect your modem at the pillar to see whether it sets up right.

With your current config, taking the modem to their location with a laptop to see when on their premises the channels setup.

There are times that the info they are looking at (informational) they say it was provisioned, when escalated within to the group that has a higher level and could access the equipment on their side to confirm the provisioning/setup of your equipment.

Often the issue is with an errand service rate on your account the leads/causes a mismatch.....

Did you try a different computer yet? If Comcast is sure, then only two possible things.
1). The modem if faulty
2). The computer is faulty.

But I really don’t like all those error messages showing power problems.

So to confirm, you took your modem out and used Comcast’s modem and you got the exact same results?
That would tend to point to either the computer, or in the system so where between your modem and the head end.

Best I can guess with these results b

If testing with another computer, it should be different, not another computer like yours.

Sorry, I’m not sure what else to say here. Stats point to a weak signal, pointing to a possible wire problem or modem problem. But if Comcasts modem shows the same result, it’s most likely not the modem. That points to the computer or cable system. If Comcast says its all ok, back to your computer.

Wish I had more. Sorry.

Ive tried several other computers.  Some super hi performance.

What in the world could cause my puter to have a chaotic signal like this?

Option 2 on Owen's list attributable to the computer would only be tru if the pergormance was low while there are no errors on the cable modem.
It might be possible the channels ramp up (sync up) as the need arises.(on demand type of bandwidth scaling)

IMHO, eliminating computer, cable modem is to rest pergormance while connecting at Comcast premises.

Insist on having them recheck the provisioning after that.
Escalate, complain to get to the group in charge of their side of the equipment.

Have them confirm the linkage.

Do you have X1 where you could run apps, testing through that?

Your setup coax to. Tvs? Or wireless and they consume bandwidth?

The errors/noise on channel setup,

Sounds improbable that they say the connection us clean, but your modem log points to faults on channel setup/negotiation.

Presumably everytime you call, they go through the same testing procedure, depending how well you kept records on when and with whom you spoke, using that to force an escalation following repeated .........

It might be possible the channels ramp up (sync up) as the need arises.(on demand type of bandwidth scaling)

I do not know how much it has changed, but Comcast’sdesign was to boost at first, providing highest bandwdth right up front so pages loaded fast, tapering off some, and then slowly speeding up over time for long downloads ads.

It looks like Arnold and I have come to the same conclusion.  I would call Comcast service, explain the problem (That you are seeing 20 to 30% bandwidth at best) and no one can understand why.  You might have a printout of all those log errors to show that the modem is having trouble negotiating full speed. Tell them how many times they have been out, and still no help. Ask to be raised to a higher level of customer service.

But if other computer are all doing the same thing, then the computer seems an unlikely problem. You did say the other computers are doing the same thing.

Confirming you are wired directly to the cable modem with NOTHING but the wire between the cable modem and computer when testing.?
Confirming that Comcast tried their modem and it was still slow? This was a real test and THEY saw slow speeds?  If so, why did they think that was OK?
Confirming that Comcast tested your connections and line and all show good? Wondering how they tested?
Confirming you have tried DIFFERENT computers, not just others of the same brand/model?
Confirming that nothing else is on your network and your set top is off and not streaming or watching TV?

Do I have this all correct? All these things have happened exactly like this?

I want to make sure you have not glossed over anything, because I’m running out of possibilities.

The on,y other time I saw something like this, squirrels had eaten through the coax from my house to the poll. They like the small electric buzz they get. But that caused that wire to pick up local TV and radio signals as increased noise interference and my cable data dropped to about 10% of what it was supposed to be.  Took three techs on three visits to finally see the chewed through wire near the trees. They replaced that run of coax, and my system sped up like crazy.  That is why I want to be sure end to end is inspected.

𝗟𝗢𝗟 𝗺𝗲 𝘁𝗼𝗼!  𝗜 𝗱𝗶𝗱 𝗽𝗶𝗻𝗴 𝗰𝗼𝗺𝗰𝗮𝘀𝘁 𝗮𝗻𝗱 𝗮𝘀𝗸 𝗮 𝘁𝗲𝗰𝗵 𝘁𝗼 𝗿𝗲𝘀𝗲𝗮𝗿𝗰𝗵.  𝗦𝗼𝗺𝗲𝗼𝗻𝗲𝘀 𝘀𝘂𝗽𝗽𝗼𝘀𝗲𝗱 𝘁𝗼 𝗰𝗮𝗹𝗹 𝗺𝗲 𝗶𝗻 𝟮𝟰-𝟰𝟴 𝗵𝗿𝘀.

There's something very wrong with this signal coming into my apt.

I sure hope theres not something wrong w/this desktop!  But how could it be when all other computers I tested are the exact same speed problems???????

I wonder how to contact a manager?  They never give phone numbers, and they will NOT give you any managers.  Comcast is a horrible company.

You have to be forceful citing the many times you called and having the same underwhelming results/performance.

The rep you are talking to can see all the prior calls you made.
If you see you are going over the same ground, ask for escalation, supervisor, ask to talk to so EOBs from the group that does the provisioning.....
If necessary, call daily ...

I agree, Comcast consumer has awful customer service. That is why I USED to use Comcast Business, but they are WAAAYYYY to expensive when it comes to Gig internet sadly.

Just keep insisting. Make sure they know you have debugged this like crazy and can't find anything wrong on your end.

ok.  who else sells gig internet in CO?

You need to narrow your search from CO to your local city and maybe even your neighborhood. You will search with your zipcode usually

AT&T is deploying fiber at a very fast rate across the US, so check here to see if in your area:

https://www.attsavings.com/lp/internet-plans?kbid=104183&gclid=Cj0KCQjwguDeBRDCARIsAGxuU8Z81wobSHDyMwj9faGDwympP275mthjuQpGR_ieGmAUOKUL7gmAzE0aArCDEALw_wcB

You can go to this site enter your zipcode and tells you who provides options for internet. It does not assure you that gig internet is available though.

https://www.highspeedinternet.com/view-plans?kbid=95781&gclid=Cj0KCQjwguDeBRDCARIsAGxuU8YLmgq-IusVqGC0lLUosQlrefZPO9BHo-9J1XOhGFm5VdZqEfiWRzEaAneuEALw_wcB&gclsrc=aw.ds

nobody else does.  strange.  why are we stuck with this terrible company?  no competition!

Does CenturyLink offer gig internet in your area?

no

Mark, when I upgraded to Gigabit Speed, I did not go through the XFINITY site, rather I went to Comcast.com so I could speak to a Human rather than wait for a call-back, that Customer Number is at https://gethuman.com/phone-number/Comcast  I did not log in to my account

The number they give is 800-266-2278
Navigate phone maze to a human
Press 0# each time it asks for a phone number then wait. For existing customers you must ALWAYS enter the last 4 of your social number that belongs to the account holder, then press 1, then 2. - If they need your account number, it's listed on the XFINITY site under My Account.

It says an average of 29 minutes to speak with someone but didn't have to wait near that long. Quite a few years ago I had used Roadrunner cable high-speed internet, then Comcast bought Roadrunner. When they came out to set-up my Gigabit Speed, they changed the wiring to our home. He came inside to help set it up, said I needed a router with a Gigabit Port, which the Netgear Nighthawk R9000 has both, standard internet port and Gigabit port. My Motherboard has two cable ports, one in and one out, also two Ethernet Ports. The router is 802.11ad, backward compatible with all other. He went into my router setup and noticed it has WAN Port Preference, under that is Internet port (1 GPS) and below is 10G LAN SFP+ Port (10 Gbps), below that it shows a line SFP=Module Detection, that can be set for AUTO or DAC Mode Only. After he ran the new line, he tested it with his own meter, once hooked up, he tested the speed on two sites n my desktop, both showed in the mid-900-gigabit speed. I have no idea if Colorado and Houston have the same types of setup.

The XFINITY Gigabit Availability for Colorado is in four primary cities if the map is correct - Boulder, Colorado Springs, Denver, Ft. Collins, Longmont, and all other Comcast Colorado service areas.

Im trying to get more logs on the Modem but they stop on 10.26.  
How do I get the last week's logs?

See whether it is configurable, though commonly, the logs are only available for ...

See whether it support logging to syslog. Then you would need to set up syslog-ng to receive them.
The logs rotate, if the connection stabilized, there are no events to be added.
Access the modem and see what it reports about the sync status of the channels?

Cm errors?

does it have a large number of uncorrectable errors/codewords?

Arnold, look towards the top of the discussion for a log listing with errors and the discussion of same. Maybe you will see something we missed.

I saw the log, it reports major events, the status of the channels on the modem and cm errors are not logged, but reported in the form of counts....

Consider your event log on the desktop. Everytime the connection to the network is removed, you get a Nic event,
However when using netstat -s you get stats that include crc errors, etc.

While the network does not drop, which means no event in the event log, while the netstat -s you see packets received, transmitted, errors.

Point is to see whether the errors continually increment ....


Stats of whether the provisioned channels locked, QAm, SNR ...

Since you're not seeing added log entries it suggests that your config matched where the additional channels are not trying to sync in.

Good morning guys.  Arnold, Im a little confused about your posts.  Can you clarify plz?  I need:  Do 1-2-3, a-b-c

Thanks. I was not sure what you were looking for.  I understand now.

If that is the Netgear modem, that info is displayed on the status page right up front it I recall.  

But from that original log, it looks to me that all channels are not connecting. I believe he is either in a noisy environment, there is aline problem to his house, or he is just too far out on the node to get a good signal (which would surprise me.)  Or, the modem is just faulty.

This is the mgmt page.  Errors only go to 10.26

Mark, there should be a page that shows which channels are connected. I do not recall how to get to it without being in front of the modem, but I am sure it is there. And as arnold has pointed out, there should also be an error count page that shows total errors.  You might need to poke around the screens to find it.

Oooh I see.  They want you to click "Refresh" to view current errors

Is posting the errors with the MAC safe?

Not sure I understand you.

If you are on a Mac, you can take a screen shot. (Command-shift-3), and post the image. Or even better, drag and copy the error text and just paste it into an answer here. You might have to clean it up a bit after pasting to make it look good.

But there should be no info there that is unsafe. But if you are concerned, look through it for your IP address, and simply replace it when pasted with xxx.xxx.xxx.xxx if you are concerned.

He means MAC address, and yes... never seen or any use outside of your LAN.

oh sorry what I meant to say with a Mac address

CM-STATUS message sent. Event Type Code: 24; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 .;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:45:34 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:45:34 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:44:26 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:44:14 Warning (5) MDD message timeout;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:44:10 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:44:09 Warning (5) MDD message timeout;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:44:06 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:42:32 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 .;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:42:32 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:42:32 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:41:56 Warning (5) MDD message timeout;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:41:53 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:41:52 Warning (5) MDD message timeout;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:41:49 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:10:12 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 .;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:10:12 Notice (6) CM-STATUS message sent. Event Type Code: 23; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:10:12 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:09:43 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:09:31 Warning (5) MDD message timeout;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

2018-11-02, 09:09:28 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6

Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-11-01, 20:57:45 Critical (3) Resetting the cable modem due to docsDevResetNow

Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-10-30, 18:03:35 Critical (3) Resetting the cable modem due to docsDevResetNow

Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-10-30, 12:30:29 Critical (3) Resetting the cable modem due to docsDevResetNow

Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-10-27, 16:45:22 Critical (3) Resetting the cable modem due to docsDevResetNow

Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-10-27, 16:32:25 Critical (3) Resetting the cable modem due to docsDevResetNow

2018-10-27, 15:50:41 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2018-10-27, 15:50:36 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:d2:94:62:cd:f8;CMTS-MAC=00:01:5c:8d:f0:4f;CM-QOS=1.1;CM-VER=3.1;

Look on the modem status page.

What does it display?

I am looking at info reflecting counts (counters)

The log entries deal with channels. The channel might be connecting, not locking, for a certain duration the modem tries to pass traffic through.. At a threshold (system not configurable) it determines channel 7 has too many errors, and it starts to reestablish connection on the "faulty" channel.

I'm trying an Arris surfboard right now. About a half hour ago I got off the phone with Comcast and they weren't able to get the modem provisioned yet so I'm waiting for that.

The former post is the logs out of the modem and the answer to your question is that the status is always good

I am not interested in the status, green/red but the statistical usage.
Number of packets/codewords received ....

The point is trying to determine whether the connection is stable.

Let me framing another way.
I place a call to you, you answer the call.
The connection is established, but half of what I say you can not hear, a third of what you say I can not hear.
So while the connection is present, if you look at the phone, it will indicate that the connection is present, status good, but you or I will periodically hang up, and will redial to reestablish the connection in hopes it will be better.

Unfortunately, the above does not extend the analogy as all each sees is the duration of the connection.

The cable modem maintains stats of received and transmitted data.
Received data is categories, as good received, issue with received that has been corrected, received but could not be corrected...

In different communication transmit events receive confirmation from remote side that it was received...


Different schemes, the point being to look at stats paying close attention to encountered errors and whether they are being continually increasing.

The surfboard, presumably you will login 10.0.0.1, connection, status etc, near the bottom of the display its hold reflect the stats, number of channels locked, and utilization counters....

Arnold, Im really sorry.  I am unable to understand your posts.  :(

Ok, CCast T2 got this next Arris SB6190  3.0 going after 3 hours and it's doing the same thing as the rest except this one has a slower up speed

CCast's sending a sixth tech out, Monday

The modem as statistical counters of data passing through it
Point of interest is whether what is passing through the modem is corrupted because of an unstable link up (channels locked, but not in a Google state)

The tech has a meter, but that only tests for signal levels across channels.
The modem in the other hand handles data flow.

Make sure when the new tech checks signal levels, and tells it is all within good range, ask the tech to get to the provisioning group, and other more technical group to address the linkage issue.

They all said their signal is w/in good range.  Good clean signal he said

I expected nothing else. Whikethesignal is within acceptable range the modem perfomance is not. The thing has to be escalated to the provisioning, emgineers that can look at the resources that can check/monitor the link.

The log, at the connection stTus related to the received/transmitted data

Taking both your and their modem to their facility to see whether the link on their premises will setup as 1gig provision......

I've tried 5 different modems and I'll do the same thing. I've tried three or four different computers in it it's all the same thing. My desktop is too heavy to bring down but I could bring my work laptop I suppose but what good would that do when it does the same thing with all modems and all computers?

Bnpoint out that there is sonething wrong either with the provisioning if the connection on their premises does not achieve the 1gig link or that there is something wrong with your line/equipment feeding your node..
If on their premises, your speed test with the work laptop gets 1gig within 10%... Points to path related issue from their equipment, to the node, to your house.

The field tech can see channel strength level not whether those channel speak in the right language.

No doubt in my mind that every time the techs came out and tested signal levels, they blamed the modem as faulty, but after two, three different ones, it is clear it is not the modem.

all five technicians claim they've measure the signal from the apartment to the pillar they don't know what else to check anymore and they say that they can't support the computer

Signal to the premises doesn't really matter - if they said it was "good" before then it probably is.

If they can't prove the speed that is getting as far as the modem then you need better / different tech's!

If they don't already tell them that they need to come along with a laptop that they can plug into the modem / router and test the speed of connection you are using from the ethernet side of the modem, not just the signal levels on the cable line.  The modem may well be connected and say it has a gig connectivity.  If they can connect their laptop to modem and get full speed, then they should connect to your router and test from that.  If they CAN'T get full speed then it is 100% THEIR problem to escalate issue to give you the service you are paying for, or take the easy option and refund "sorry we can't do it".

Comcast technicians claim they have an xmt device thatemulates a computer that can receive a gig so they already tested that and it's getting one

Advise them to bring a laptop, tablet or other device that can actually do it and SHOW you... if you want to rule out your computer does your smart phone connected from wifi get anywhere different -- "Ookla Speedtest" works well on my Android device.

The field techs do not have computers, that is not what or how things are done by them.

A good comparison, is with a phine company. Let's say the scenario fits.
I.e. A person complaints to the provider that whenever they call a specific number, the connection is bad, unusable.
The reason the two speeak any language but English.
The tech comes out, listens to the signal level from the other side and says, I can hear something, the connection is good.
The volume of the incoming coversation is within acceptable signal level strength.


Presumably. The previously suggested test dealing with speed test on local lan between systems.
If memory serves, you've tested with a system directly connected to the modem including when only one system was connected.

that's why they use the xmt

The errors on your modem dealing with inability to lock certain channels points that Xmt is not a sufficient test or an indicative one that attributes the issue to your. Equipment, given the number of modems used that have shown the same underwhelming performance.

Testing your modem, with laptop within their offices.......

another question to ask is the xmt Tests the line from the box  on the street to the modem.
What about testing the signal quality beyond that, end to end, Comcast facility to modem in your house.

Given you've tried five different modems with the same results, the field tech tests are inadequate to determine the issue.

How far is your local customer center? Take the modem you purchased with your laptop there as proof.
Copy the logs from the modem at home pointing to channel sync issues, then show them the logs on their premises which presumably should lock all provisioned channels without issues. And the speed test on the laptop should confirm....

They already tested all that five times they said.  Not sure if the Storefronts have the ability to set up equipment.  They're only there to make or change orders, that's all

Check with them on whether it is possible, then check whether you can have them test from their office, or ask for a new connection at the street level.
Put forward that no matter what or how many times techs came out, their tests show good signal strength, but the modems fail to setup and provide the 1gig performance for which you signed.
Noting it is a poor reflection on their .......
Might loosen/motivate them to escalate

You can always ask for escalation, I.e. Having had the fourth tech cone out, and tried give different modems (1 purchased, four provided by them, ..........)

this morning I'm working and I'm using my HP zbook with 32GB it's an engineering laptop very fast. I'm only getting about 50 down in about five up. On the desktop I'm getting about a hundred and seventy-five down and 36 up. I have the laptop plug right into the router this time. I haven't tested the laptop plugged into the modem yet though. I wonder if this is part of the problem or does this help with troubleshooting?

Why is this high performance laptop getting such horrible speeds?  Is there a setting I need to change on it?

Can you try connectivity between the laptop and desktop PC rather than to the internet?

You may have anti-virus / firewalling software intefering too.

The issue is likely related to the connection not setting up correctly.

If memory serves, you tested your laptop with other?

Check whether your work laptop reflects better rates at work.

Setting up your own mini test ........and testing the through put on the LAN in the event you have a faulty switch, though I believe you mentioned that you tested with the laptop connected to the modem directly.
 (wired) do not try wifi as that is susceptible to interference and impacts ...

The status of the surfband modem does it indicate all channels locked?

See attached PDF displaying bottom of the connection status page, home local network status view....

last is the stats.
Display_home_network_status.pdf

I just tested the connection; modem directly to work laptop and it wasn't getting an IP from CCast.  I called in and they said they had to "provision it" again.  I dont understand why I have to "provision" my connection EVERY STINKIN time I plug the cable into each of my different computers.  

This is a complete FARCE!

Sixth tech just came and said he thinks the coax is from the 70's when these buildings were built.  He scheduled a new cable run for this Friday.

The way comcast provisions an IP is based on the MAC address of the device directly connected to the modem. Once allocated, a new device connecting the modem, will not be authorized to get an IP unless and until the modem is rebooted.

If the sixth tech says that, what were the prior techs testing with the XMT?

Good luck. hopefully this will be the resolution to your ....

yes.
And, are you saying that I have to pwr cycle the modem each time I plug another pc in it?

Yes. The modem, ip, MAC address is the lock. Wired connection. When modem is in bridging mode.
Once you connect anothe device directly to the modem, it will not get allocated a public ip.

If you do not need public ip, you can set your computer's ip to 10.0.0.2-10 255.255.255.0 10.0.0.1
Much depends on the operating mode of the modem, routed mode with DHCP you could connect different devices to which the DHCP will assign local Ian IP.
If the modem bridges, I.e. Your system gets a public ip, then this requires a power cycle everytime a different device is connected.
In bridging mode, the wifi will likely not work.

okay it's the end of the day and I switched my network cable back to my router setup and it says no internet connection please contact your ISP. I've restarted the modem and the router and the computer and still no IP

double check if the modem includes a backup battery, you have to disconnect it as well when powering off, power cycling.

no battery

If your modem is in routed mode, meaning it is functionally have a WAN ip (public IP from Comcast/ and LAN, DHCP ) there is no need to power cycle the modem when switching devices.

I think the one from comcast, SURFboard SB8200
https://www.arris.com/surfboard/products/cable-modems/sb8200/?gclid=EAIaIQobChMI3vvglI3A3gIV2FuGCh2BgwvSEAAYASAAEgLTHvD_BwE&gclsrc=aw.ds
Has two GIG ports, I think Comcast provisions which port is functional/to which a public IP will be allocated.

Your best bet is to check with them..

It "shouldnt" happen, but it does.

In the modem comcast leased to you, sufband is actually not the retainer of info, you have to turn it off, and allow time for the session to clear from their equipment 10-20 minutes.

At this point with all that you tried, it is an issue that a new RG6 cable run should fix on Friday.

no

What do you mean by "no"?

When they run the new cable see if that fixes, or Firday is when the tech said the'll schedule the new cable deployment?

I wonder what test equipment they used. Did they use a signal analyzer that check for QAM signatures (I doubt it!) or just power levels, which is mostly useless.

There is not much more I can add here. I see that Arnold has run through much of what I originally suggested as well as most of what I would have added at this point anyway. (Thanks Arnold, I was out of town!  :-)  )

Good luck. I am out of ideas here if you cannot get Comcast to come out and do a proper analysis of why your modems do not get a reasonable channel lock in your house.  I am still guessing ingress noise, which I bet they do not check either.

As I said before when I used to have Comcast, they told me my signal LEVELS were just fine, but I got almost no data throughput. Turned out the line running from my house to the pole had been eaten through by squirrels allowing a LOT of noise to interfere with the signal.

Lucky for me, I owned a QAM analyzer (Doesn't everyone? :-) )and could look at the data constellations and see the noise problem. Took about 15 calls and techs until someone who understood how the signals worked to look at my piece of equipment and realize there was noise in the system.  They examined my cable drop and found the cable damage. All that time, their measured signal LEVELS were fine.

So you have:
1). Eliminated the modem as the problem by trying several.
2). Eliminated the computer as a problem by trying several.
3). Eiminated your local equipment by connecting directly to the cable modem (RIGHT?)

This does not leave many more places to go to look for problems but in the Comcast equipment and drop.

While I doubt it, this could be in the neighborhood node, but that is highly unlikely as other neighbors would be complaining. But Comcast needs to go from your house all the way back through their path to the head end to find the problem.

My concern at this point is they will finally say, "Well, it says UP TO 1 Gb" and give up. You have to be annoyingly persistent.

Good luck.

Thank you.  I will see you guys after Friday.

Ok.......Comcast came and pulled the cable.  Took 15 minutes.  Now Im getting a gig.  HOWEVER, the Amplifi router is only allowing ~150mb thru.  I sent logs to Amplifi.  Waiting again.

This is presumably wifi, check which wifi your connection is using.
I think only 802.11ac might approach.
Check the speed (link) at which this router connects to the modem (which are you usin surfband, or the netgear)
I.e. The speed of the wifi Connection will be the limiter.

First test if you can through wired connection on all devices in the chain.

Im only testing the cabled connection modem > router > desktop.

Netgear or surfband as the modem?

Im keeping the Ngear CM1000
Getting ~100 down, 50 up

Didn't I suggest that the drop to your house was probably at fault WAAAAYYYY up at the beginning?

If there are additional router problems, i suggest closing this question, awarding some points, and opening a new question about the router. This question is already too long.

Thanks.

of course you did! And you have posted some incredibly helpful and intelligent posts. But you can't force Comcast do anything they don't want to do

Thanks. Just wish they would listen. Oh yes, well aware of the wonder that is the consumer side of Comcast. I only use their business side now. Sadly, way too expensive to go Gig internet with business,  but they are responsive and do great service. They know how obviously, but o guess just don’t want to spend the extra money consumer side for better service. Sorry you had to go through that mess. It’s one of the reasons Comcast is one of the most hated companies in America in a recent customer poll. It’s also sad that this is most people’s only choice right now. A little competition would do them some good.

Waiting for  Amplifi to test...

hi guys! I switched out my router at microcenter for a Linksys system with three nodes it's a wi-fi system. I connected the modem to a small switch.I plugged the desktop into the switch and the first of the three notes into the switch as well. The Wi-Fi is working fine and I am not able to get the computer desktop to pick up a signal so it's remaining disconnected right now.

And I'm not sure if I'm doing this correctly with the switch but you guys could help me with that too.

Please refresh what the current setup after all the changes is.

Double check settings on the desktop to make sure it was not configured with static IPs that now differ from the equipment in use.

I.e. Setup as 10.0.0.3 but now your LAN uses 192.168.1.0/24 IPs.

I've checked the setup several times and did restart and all the equipment still no signal to the desktop. no IP changes are made that I know of

Ok, I had the topology wrong.  The modem goes to the wifi node which has DHCP running on it.  Then a cable from the node to the 8 port switch.  Then a cable from the switch to the desktop.  When I first tested it, I was pulling 935mb, but any other times after that, Im back to the 200mb range again.

Mark, can you test again directly connected to the AT&T device? Also, I do not recall what you are using for a speed test, but maybe you need to try a different site, or use AT&T's own speediest: http://speedtest.att.com/speedtest/

Also, please make sure you are not actually connected via WiFi rather than the cable please.

The provider is Comcast, testing to AT&T will report an average distant path.
What type of 8 port switch?
At what speed does the desktop connection say it is connected. Network sharing center, properties of the local connection?
Does it say anything other than it is connected at1gig (1000mb)

Most things/rpurers are 1gig, just confirm.

Sorry, too many open discussions. DOH!

Lets change AT&T for Comcast, and use their speediest: https://business.comcast.com/learn/internet-speed-test
Thats the business one, but it works better.

I am curious if even though you have a cable connected, might the priority of your network on that machine be WiFi over Ethernet?

I cabled the desktop directly to the modem and Im getting 900's again.
I need to call Linksys about this issue.  I have the VELOP system.

www.linksys.com/us/c/whole-home-mesh-wifi/?utm_source=bing&utm_medium=cpc&utm_campaign=DA | Brand | Velop | B2C&utm_term=velop&utm_content=Phrase

That is odd. But your direct connect test says you are getting the right speed to the house now. That is an excellent first step to narrowing down the problem.

So keep in mind that Wifi is never going to reach 1 Gbps. The theoretical max speed of 802.11ac is eight 160MHz 256-QAM channels, each of which are capable of 866.7Mbps, for a total of 6,933Mbps, or just shy of 7Gbps. IF ALL CHANNELS CONNECT.

More realistically, these are max speeds you will see:
802.11b - 11 Mbps (2.4GHz)
802.11a - 54 Mbps (5 GHz)
802.11g - 54 Mbps (2.4GHz)
802.11n - 600 Mbps (2.4GHz and 5 GHz) - 150Mbps typical for network adapters, 300Mbps, 450Mbps, and 600Mbps speeds when bonding channels with some routers

So testing on WiFi will not be full speed. And a physical wire from a mesh device connected wirelessly to another mesh device will run at wireless speeds, not "wired" speeds. So I do not know your set up, but a wired connected to a mesh device will run at WiFi speeds.

The best speeds will be directly to the cable modem. Next best speeds will be a physical connection to a switch connected directly to the cable modem.

Maybe a drawing of your network would help here.

I'm on the phone with linksys

Linksys says they dont see the issue with the router, so I called CC back with Linksys on as a conference call.  All CC can do is open another ticket.
Speeds are back down to 100-200 again

Called adv support team and they said "there is signal leakage from the street to the pillar"

Called adv support team and they said "there is signal leakage from the street to the pillar"

I called that one very early on too. It is just too bad that they take so long to actually test this stuff. Hopefully that will fix the problem. Signal leakage also means signal ingress which causes interference which means more error correction of complete channel failure which means much less bandwidth throughput. Not to mention that it is a violation of FCC. Rules to have a cable system leak signal.

Wow!  can you cite a source for that FCC rules?

I think FCC on leakage deals with over the air encroachment . not sure "signal leakage" within the cable would fall into FCC regulated..

Deals with if you are assigned the 800 MHZ carrier for example, but your signal genrator is faulty, setting so that you encroach on the 850 MHZ subscriber.. i.e. instead of 40 MHZ wave, you have a 50 MHZ .....

source???

Fcc does not regulate signal transfer within a cable. IEEE/TIA usually issues standards for in cable type standards.

Source for FCC and signal encroachment?
Here is a subset of a regulation dealing with adding hardware to boost signal and FCC guidelines related to what..

https://apps.fcc.gov/kdb/GetAttachment.html?id=e%2BqBBvZPOFhrhNrxaN6toQ%3D%3D&desc=935210%20D03%20Signal%20Booster%20Measurements%20v04r02&tracking_number=20673


FCC regulates radio frequency, signal over the air.

I would have to go find it.

I just know when we deployed the first HFC network in California in 1995 (yes, the big brother of the system you are using now, as PacBell, the system we designed and engineered, was sold to AT&T Broadband, which was later sold to Comcast. Sadly, each sale removed a large portion of the reliability originally engineered in. Anyway...) we had FCC all over our system looking for signal leakage. Our compliance officer was in charge of that, and would tell the engineering team where we had issues. He is the one who told me that the FCC had rules and regs on signal leakage.

Since that is a long time ago, maybe this has all changed. Here is a page on the FCC about leakage: https://www.fcc.gov/consumers/guides/cable-signal-leakage

But it is a big problem, and it causes more problems for users with INGRESS signals. The leakage is usually such low power as to not be a problem.

Intereßting, though "cable system" is not the same as within "the cable"
Radiation from electricity going through or leakage referenced deals with RF signal radiating out, I.e. The power of the signal within the cable that might convert the cable to behave like an antenna emitting radiation, rf wave that could interfere with other rf signals and that is when FCC kicks in.

Anytime electricity flows through any electrical cable there is a magnetic field.i.e. Power line reports...
The power lines often have specific design to mitigate .......

Back to the topic, check when you gave everything connected along with poor transfer performance the channel status on the Netgear modem.

Presumably, you set a new, wpa secured wifi. Potentially try the following when testing while the linksys is connected, turn off the wifi part. And see whether the wire connected workstation will once again reach near 800 in transfer.
Potentially what wifi devices are connected ....
The break/malformation in the cable manifest in a lower width of data transfer, I.e. Something else is/has a bandwidth demand, when you test, ......the wirelibe manifest.
Double check when you are testing that your desktop us not at the same time leeches sone bandwidth to retrieve Windows related updates/upgrades (win 10 getting the newer 1809 update.....) or your settings make your system an available distributor if updates.

I have owned quite a few Linksys routers and have never seen the Wifi slow down the wired ports. That would be a real bug. Be curious to see the results of that test.

YUP!  and I just filed a complaint w/the FCC!! :)

I do not think the wifi functionality is the cause, but when active other devices have already been connected and are using a portion of the bandwidth ...... While it should not, it might be reflected....

It indeed is a possibility. Mark, I hope you will test arnold's idea please.

Sorry, not sure I know the question. :(

Arnold wants you to turn off Wifi and run your speed tests again. He wants to see if Wifi on your router might be causing a slowdown problem as well.

Potentially try the following when testing while the linksys is connected, turn off the wifi part. And see whether the wire connected workstation will once again reach near 800 in transfer.

ok., yeah, ive tried that like 600 times.  there's nothing I can do to fix it

To read your response, disabling the wifi and the desktop connected through the linksys the transfer rates drop to 100-200, while connected directly to the Netgear the transfer rates are at 800-900.

At what speeds (link) does the Netgear and linksys reflect they are connected to each other at?

speed goes from 50 to 800 awhile then back to 50-200 and never goes back to a gig hardwired.

**********************I NEVER TEST SPEED OF WIFI.............ONLY wired conn.*****************************

sorry for caps.  just want to be sure everyone knows this is about the wired connection only

Sincce it seems there is a misunderstanding of what the request is/test.
Your connection to the desktop is wired to the linksys which is wired to the Netgear. The linksys includes wifi functionality allowing other devices to connect over the air. The request to turn off the wifi on the linksys to eliminate the possibility that another device connected wirelessly consumes the bandwidth that manifests in the reduced tranfer rate tests.

Think of this way, you can pull a cart with 100 pound or kg (pick your units) load from point A to point Y in 10 minutes.. The cart includes options to chain attach additional carts.
You go to the cart, get the load on, and complete the task in the 10 minute timeframe.
You then have someone else load the cart, but this time, it took you 30 minutes to complete the task.

My request is under these circumstance, make sure there are no additional loads attach to the cart you are pulling.

There are no other loads with mules when the modem goes to the pc

perhaps I am not making my question clear.

Comcast feed <=> Netgear modem <=> desktop speed test 800-900

                                                                                   ////
Comcast feed <=> Netgear modem <=> linksys with wifi turned on <=> desktop speed test 100-200

Comcast feed <=> Netgear modem <=> linksys with wifi turned off <=> desktop speed test what is the speed?

<=> represents wired connections.
/ represent wifi connection

Does the desktop have wifi capabilities, turn wifi off if it does.
The priority wifi over wired is a user specification. When both are active, sone think the wired will be preferred. While common, have seen when the wifi took precedence.


Netstat -rn
Look at the metric value, the higher the value of the metric, the lower the preference of the connection.

Does the desktop have wifi capabilities, turn wifi off if it does.
The priority wifi over wired is a user specification. When both are active, sone think the wired will be preferred. While common, have seen when the wifi took precedence.

Yes please. I suggested this a while ago to be sure that your laptop is not using Wifi EVEN if a wire is connected. I mentioned this as a possible source of error. My MacBookPro running Windows 7 constantly wants to prioritize Wifi over Wired (I finally fixed that) so I could not understand why it was so slow wired directly to my switch. I turned off WiFi and voila, high speed.

So first, turn off Wifi on the test machine.
Second, turn of Wifi i the Linksys router.
1: Hook up directly to the Netgear Cable Modem. Do several tests and record the results.
2: Hook to the Linsys by wire, re-run several tests.
Turn Linksys WiFi back on
3: Rerun several tests.

Report the results of 1, 2, and 3 above.

Thanks

right the desktop does not have a wireless card in it

Ok, well that solves any WiFi issue on the computer side!  :-)

Did you try the wired connection THROUGH the Linksys with the Linksys WiFi turned off? While I think neither arnold  nor I feel it should make any difference, we still want to see the results. Can you do this please?

0. Turn off Wifi on the Linksys router.
1: Wire up directly to the Netgear Cable Modem. Do several tests and record the speed results.
2: Now wire  to the Linksys and re-run the same tests.
3. Turn Linksys WiFi back on, and Rerun the same tests.

Thanks. Sorry to have you jump though test hoops

Curios if the connection if for the computer to the netgear whether it is in briding mode, the public IP is passed to the PC, or in routed mode where the netgear has a wan port and a LAN port.
Then when the linksys is connected, the netgrear is rebooted. and Comcast allocates a different scheme to the linksys device....

if the netgear is in bridging mode, see if it can function in a routed mode or use linksys mac clone option from the desktop. after the first test and see if the speed performance changes.

the routers 3 nodes only have on and off switches so you can't turn off just Wi-Fi

Ok, wait a second. Please explain how the PC is connected when using the Linksys.
This is what I assumed:

Wire from Netgear to One of the Linksys nodes.
Wire from the SAME node to your computer. (there are two ethernet ports in each node, right?)

BUT, if you are going Netgear to Node, and then Node to Node via wireless, and then second Node to Computer via wire, then you are on Wifi, 400 iis the best you are going to get unless the node is really close and can switch to the 5GHz signal.

BUT AGAIN, I want you to login into the first node with their embedded web browser or phone app, or however you can configure the node, and turn off Wifi on that one node for now.

Looking at how their mesh stuff works, I am wondering if the ethernet ports are limited by the mesh in speed.

Make sense?

This is in the Linksys disclaimer:

‡Maximum Performance derived from IEEE Standard 802.11 specifications. Actual performance may vary, including lower wireless network capacity, data throughput rate, speed, range and coverage. Performance depends upon many factors, conditions and variables, including building materials and construction, volume of network traffic, mix of wireless products used, interference and other adverse conditions. In order to achieve the best performance, this product must be used with compatible AC2200 wireless devices. The standard transmission rates for each node—867 Mbps (for each 5 GHz radio), 400 Mbps (for 2.4 GHz)—are the physical data rates. Actual data throughput will be lower and may depend on the mix of wireless products used and external factors

The modem goes to the wifi node which has DHCP running on it.  Then a cable from the node to the 8 port switch.  Then a cable from the switch to the desktop.  

Ok.  So I still need to confirm some thing:

When you connect to the Netgear directly, you are getting 800+ all the time? Yes or No?
When you connect directly to the Linksys (remove the switch) what speeds do you get?

I want to eliminate items. Thanks.

no matter what why I connected I get about 50 to 200

Comcast said there's some kind of leakage out of the street to this huge complex we live in

OK. Then we wait again. I thought you said earlier that you got full seed when connected to the Netgear. I guess I misunderstood. Sorry.

oh I did for about 5 minutes then it went right back to 50 to 200

Ok, sorry about the confusion. Funny that this all comes down to a problem I originally suspected. Let's hope they can fix it soon.

I would ask for a monthly credit since a problem with their equipment (the cable) is preventing you from getting what you paid for.

they ain't doing squat to reimburse us for the last year of problems

Time for a BBB complaint to start.
Then you might file an FCC complaint as well.

That is one approach, keep calling them until they resolve the issue, then raise the issue when dealing with their billing side.. They will likely not give you anything for past undrrperfoance but would potentially give you discount for the following six months, a year.
Much depends on how stern without yelling you can be, in escalating to a higher level person within the department. With references to each time you called their techs, who came out and kept saying they found nothing until recently and finally....

Much depends on what other options you have if you were to choose another provider. I.e. Threatening to leave means you have to be ready to do so.
I when asked whether one should go gig connection, advise against as there is not that much that is gained functionally.
But thank you for funding the development since first adopters often fund the development and help get the bugs out for the rest of us.
I.e. Within a year or two or three, the equipment deployed has a fixed cost, so to provide gig to all connected will potentially cost operationally less than dealing with tiered speeds in operating costs...

I filed fcc complaint couple days ago

Hi guys,
Here's what I got back from the FCC today.  There's been ZERO change in my signal.


FCC Consumer Complaints (FCC Complaints)

Dec 26, 9:30 AM EST

Hi Mark,
Thank you again for your submission to the FCC. The FCC's role in this process is to facilitate a conversation between you and your provider. We received a response from your provider to your Ticket No. 2934076.
Here's what happens next:
We reviewed the provider's response and based on the information submitted, we believe your provider has responded to your concerns.
Your provider is required to send you a written copy of its response by postal mail. Keep in mind it could take up to 10 days for you to receive the response.
Please review your provider's response. If the issues you raised in your ticket remain unresolved, you can reply directly to this email with a short description of the problem.
Keep in mind that billing adjustments or other actions by your provider could take time to implement.
If we do not hear from you within 30 days, your ticket will be closed.
If you have new issues with your provider, you can file an additional complaint by going to: consumercomplaints.fcc.gov.

So remind me,  you did or did not get a new drop to your home?

If you did, and it still is bad, then just maybe it is something at your end.

Will you humor me one more time: Turn off wifi on the router from Comcast. Disconnect EVERYTHING from the comcast router. Connect a very good CAT-6 cable between one port on the modem, and your computer.

Quit ALL applications and as many background tasks as you can. I want the PC running best possible.

Now, run a few speed tests. Use Comcast's speed test for best results.

What speeds do you get?

Now, try someone else's computer as the only device and test again.

Are they the same?

There are just so many unknowns here.

my understanding is that all wires are new to the street.
Yes, I can try modem > pc
I'll check back in a couple hours

1. 935 down, 23 up.
2. 940 down, 43 up.
3. 940 down, 51 up.

uh oh.  it just dropped to 200

now it's down to 100

its staying around 50 to 200  or so, which is where it's been for the last 2 years.

Check this out....  Not sure if Im comfortable getting those files tho.
https://www.tenforums.com/network-sharing/53664-sudden-internet-speed-drop.html 

""Believe it or not, I fixed it using another post from these forums. I cannot remember the exact post, I have been up all night troubleshooting and read so much...anyway, here is the fix:

Disclaimer: Messing about in the registry can brick your system. That being said, you do this at your own risk. I am not responsible if you accidentally impregnate your neighbor's cat, or blow up the microwave, or brick your computer.

1. Download the .reg files attached to this post. They are the Winsock settings from a fresh install of Windows 10, and will work on 32 or 64 bit versions of Windows.
2. Hit Win Key + R to bring up the RUN dialog. Type 'regedit.exe' in the box, no quotes.
3. Use the > arrows to browse to HKEY_LOCAL_MACHINE >SYSTEM >CurrentControlSet >Services
4. Scroll down until you see folders labeled Winsock and Winsock2
5. Right click the Winsock folder and choose 'Export' Do the same for Winsock2. Name them Winsock_original.reg and Winsock2_original.reg. Save them in an easy place to get to. You have just backed up these keys in case something goes wrong.
6. Close the registry editor.
7. Double click Winsock.reg and merge it into the registry. Do the same for Winsock2.reg. They are attached to this post.
8. Reboot once or maybe twice.

POOF. Fixed. I am now downloading at 220mb.

If anything goes wrong, just repeat the above steps, but after deleting the keys, double click Winsock_original.reg and merge it, then do the same for Winsock2_original.reg, and reboot again. This will restore it back to the original entries. Again, this is done at your own risk, mmmmkay?

Winsock.reg Winsock2.reg

You guys still there?

Its the same problem on all three computers I have

All three computers connected directly to their router, right?

So I would almost eliminate the computers as the problem in general if they all give the same results. That does not mean there is not a computer problem, but it now seems unlikely.

If it gets full speed and then rolls back to 200, I would point at the router again. I would also read your agreement and see exactly what it is you thought you bought. Maybe it is peak speed of 1 GB and nominal speed at a lot slower speed.

I am out of ideas. I am just not sure what else I can say or do to help you. Sorry.

I had to buy that $25 hub too.  
This is so odd.  I dont know what to say either

I think this desktop may actually be the issue now.  I have our small Gateway laptop plugged in and have
been getting the gig speeds for the last couple days.

I think this desktop may actually be the issue now.  I have our small Gateway laptop plugged in and have
been getting the gig speeds for the last couple days.

Sigh. A long time ago I asked you to test this with other computers.  You said they were all slow. So now the other computers are running at full speed?  Then you PC has an issue. But debugging  is all the steps people have outlined above. Maybe at this point best to backup you personal data, reformat the drive. Put a new OS on the Disk, and only add back those apps you really use.

Good luck

we did test on all about 18 times. they were on slow but now this one is working so we must have a signal

I feel your frustration. Sorry about that. It’s frustrating from this end too.

Can you look at the machines you tested and see what is different with the one running full speed from all the others? I’m going back to a piece of software or a proxy setting or a VPN running that is slowing your connection down.

Thanks

It's got to be the desktop.  Is there a way to replace Hosts files or anything that's controlling the the computer's communication?  Like the post above on the 12th....
Mark

Yes, you canedit or replace the hosts file. It is in windows/System32/drivers/etc.  , well on Windows 7 anyway.

You will have to open Notepad by right clicking and run as administrator to alter that file as it is protected. . But you can read it without permissions I believe.

If you find nothing unusual  there, can you try creating a new user  with minimal software installed and see how that works. Maybe just your favorite browser with NO extensions.

Let me know what works.

Will do!  Hey, what do you think of this Owen?  Load of malarky to me.

Hi Amy,
My 4 computers seem to be alternating btwn 250's to 900's.  It appears the timing is about every 30 minutes or so.  So every 30 mins it changes btwn these two speed ranges.
Mark

Hi, Mark –
 
A signal will never be constant. You will notice at times that it does dip. Since we were unable to fully address the concerns and deem whether it was our equipment or yours, I cannot provide a full credit going back a lengthy period of time.
 
You added the gigabit speed on 10/06/18. It has now been 3 months to get the speeds working to the best of our abilities without being able to enter the home to address the service concerns. For these 3 months, you paid $50.00 to upgrade to the Gig speed. I can credit you $150.00, but that is the most we can do since we can’t confirm fully if it was the fault of our equipment.
 
I will go ahead and adjust the amount to reflect a credit of $150.00 towards your next billing statement. Please note that there is a current balance so it will deduct from this balance first and the amount that is leftover will apply to your next billing statement.
 
Thank you!
 
Amy F.

- and actually the speed often dips below 100mb

Speeds will indeed vary and will mostly depend on the number of people in your "node" (typically a group of 480 homes) and what the are doing. So never expect full Gbs speed all the time. As more people start using the network, it can indeed slow down considerably. I would not expect that to be on any clock though. That part is strange. Makes me wonder if something is running on a timer on your computer.

Also note that if you have a lot of Business users on your node, they get priority over consumer users, which could slow you down.

All that said, I would be a bit surprised if your node was saturated by users all the time. And only Comcast can tell if the node is over saturated most of the time. The nodes are designed to be split into two nodes when that happens, but it is costly, so I do not expect them to do that.

to get the speeds working to the best of our abilities without being able to enter the home to address the service concerns

Ok, why will you not let them into your home? They could do a test on the input to your router and the output of your router to see if that is the problem. They are very generous with that credit, but now time to let them come inside.

they've been in here about 15 times and they don't change anything

So why are they saying they could not enter the home?  This is from the text you posted:

It has now been 3 months to get the speeds working to the best of our abilities without being able to enter the home to address the service concerns

So they have not been able to address inside, or this person is wrong, and I suggest you correct their understanding. Because they are using it as an excuse to not give you any more credit.

Inside, they replaced all wire, tested my modem and theirs many times.  What else can they do inside?

I do not know what they want to do. That was not the issue here.

I was bothered by their statement (as you wrote it here)  that they claimed they did not have inside access. If that is not true, you need to let them know that they came inside multiple times. Obviously some tech's report seems to indicate they could not get inside.

I did tell Amy the escalations team they've been inside multiple times.  Amy insists they come in again this Sat.

Well, as long as they continue to try and find out what is wrong, I would give them access to whatever they need.  Be grateful that they have not thrown up their hands and just blame the problem on your equipment. Im impressed that they are still trying actually. :-)

Let us know how it goes.

hmmmm. ok.  lol. Im "impressed" too.  LOL

impressed is what happens when you try and do a post on a phone in a moving car! :-)

Hi Owen,
the Comcast tech came to the house today he said that it's a straight line to the back of my modem from the peg.  He sees everything is green but there was an error for connecting when he hooked up his equipment. But then that resolved in everything look good. So he's going to call supervisor because he said that there's absolutely nothing wrong with any of my equipment or lions in the house.  He said this one is really odd.

https://www.tp-link.com/us/products/details/cat-5582_TL-SG108.html is the switch Im using.  Linksys Velop router, netgear modem

Well, that is a positive step.  Did he also see the speed problem on his equipment?  I agree with him, a strange one.

So one failure that I have seen on installs that causes sporadic slowdown is caused by squirrels eating the installation on the wire from the pole to the house, even underground. It makes the line more susceptible to interference, which could cause a slowdown.

Another was a radio broadcaster near the customer. A Ham operator's signal was leaking into the cable, and causing havoc in the entire node. We found the leak to fix that odd problem.  But in that case, all the houses in the node had issues at times.

I hope they find this. I am curious as well now.

He said everything had a green check.  Ive been testing on my laptop all day and today it's running the gig fine.  Next Im going to build another computer when I save enough

I think it's my desktop.  Im trying to build another one.  Will let you know...

Thanks for the update. To be honest, I thought this question was closed!  :-)

Let me know what happens.

haahha  Sorry

No harm and no foul. I answer a number of questions and sometime I forget ones not closed.

But it does sound like you have some closure. They fully tested the line, all is good.

BTW, i have AT&T fiber now in my home. What I have learned is that the internet is damn slow. Very few services can keep up, not surprisingly. But multiple higher demand services see to work well side by side now.  But none of my computers is really fast enough to use the whole pipe.

Can you give me a numeric idea of "slow"?  How old are your computers?

This is very interesting

Its not really a number, It is an overall observation.  I note that even though I have 1TB fiber in both directions, thing to the internet in general do not seem particularly faster. Network latency, internet congestion, busy servers, etc, etc make surfing the web not seem much faster than my 25 Mbps I had with Comcast. Occasionally I will hit a webpage that opens quickly, or a download that goes fast, but in general, my 25 Mbps and this 1TB feel the same.

Where I do see the difference is when I download a large file on other computer. That runs better than it used to a bit, but not 200% faster. BUT, at the same time I can have a streaming video running on the TV, and surfing the web on my tablet, my wife watching videos on her computer, and they all run as fast as they used to.

That is where really fast network shines.

1T??? How are you getting that?  Whaaaa?  And FIBER?  Are you a King?

AT&T is installing fiber all over the country, and we were luck enough to be one of the early cities this time. And if you keep a home phone line, they give you the fiber at a discount. I am paying less now for fiber than I did for 25 Mbps Comcast Business.

Anyway, I believe it is time to close this question, no?

Cris HannaSr IT Support Engineer - You were the first one to ID the issue was prob the PC.
Comment posted2018-10-27If you plugged the network cable directly from cablemodem to your nic card in your pc and no difference..this issue is your pcYou may need to find a NIC that will go in the slot you have available or move things around.It's troubling that forcing the NIC to Gigabit full duplex slows things down even more

Owen Rubin - You helped extensively through the entire process.

Thank you both.  If Ive graded this incorrectly, plz let me know

Thank you everyone.  This was complex