Routers

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A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

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Budget: $200 or less

There will be about 20-30 wireless devices using the router habitually.  I also work from home some days.  I currently have an Apple Airport, but was looking to replace it after the 5 years I've had it.  Apple doesn't make them anymore (I heard that somewhere) so was curious what others recommend nowadays.  I've used Netgear, DLink and Linksys in the past.  I'm down for whatever really.  I'll probably be purchasing it on Amazon unless Newegg or something else has a better price that you know of?

Thank you so much.
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ISP uses router in front of my firewall and They use dedicated public IP block  (WAN and GW) for the connectivity.

My firewall WAN IP and other external IPs are in completely different range.

With traceroute , Router's LAN IP 10.xxx.xx.1 is getting listed as the first hop and next is ISP GW IP. The public IP assigned in router (WAN) is not getting listed.

Is this common situation with traceroute or what is the theory behind this ?
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Hello ,

I would like some assistance ,maybe some example configs for multihoming BGP connection involving two local Cisco routers ,one ASN, /22 Public prefix with upstream again with two routers. I would like for local routers to do both load Balancing and redundancy. I am guessing will need to use OSPF between local routers for proper routing between them .I would suppose too that would need to make use of loopback interfaces instead of the physical interface address for both eBGP and iBGP. Please help.
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Routing Loop seen on a workstations but not on the switch.

I have an interesting with workstations/servers not able to reach a destination IP.  The default gateway of these workstations/servers one vlan on the core switch and if we run source ping from the core switch to the destination IP, it works fine.  Not sure why it would fail just from the end workstations/servers them selves.

Workstation - VLAN 23 . --> gateway is Nexus 5K
Next Hop is VLAN 42 --> another Interface of the Nexus 5K...then it sends it back to vlan 23
Workstation - VLAN 23 . --> gateway is Nexus 5K . --> vlan 23
Next Hop is VLAN 42 --> another Interface of the Nexus 5K . back to 42
Workstation - VLAN 23 . --> gateway is Nexus 5K
Next Hop is VLAN 42 --> another Interface of the Nexus 5K

But sourcing the ping from vlan 23 and 42 work fine. Not sure what the issue is.
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Hi I have a client that has an older phone system.  The vendor wants us to disable Application Layer Gateway.  I think it's also called SIP.  Not sure.  The router they have is a Cisco rv042g-k9-na.  I found on the firewall where I can turn off sip.

Question is SIP the same as ALG?

The problem is that at exactly the 10 minute mark their calls drop.

Thanks all
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I need modem/router for 4G mobile connection.  It must have ethernet or/and USB ports and accept AT commands for sending and receiving SMS
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Anyone have any real-life experience switching a live network from a /24 to a /23? I'm running out of IPs. I already have my phones on their own VLAN. Cameras on their own VLAN. WiFi is on its own VLAN. I need more IPs for the main/workstation network. In total I have 5 or 6 VLANs and the firewall controls access between the VLANs. All switches are managed but there's no routing done on the switches.

How feasible is it to do something like this over a weekend? I'd like to find (or create) a checklist to make sure I have planned this out before actually doing it.
It's a Windows 2016 domain with DHCP running on one of the DCs. All servers are static IP. Most workstations are DHCP.

Any tips, comments, etc are welcome!
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I am visiting a client tomorrow (50 WAPs, 5 Switches) to assist them in their wireless dropout issues.
They have cordless wireless phones which were on 2ghz, they upgraded it 5ghz, it didnt resolve the issue.
They have meraki switches and waps, and cisco asa.
Meraki waps they are using are MR 42;
https://meraki.cisco.com/products/wireless/mr42 

I have worked on Meraki SWs and WAPs but never had any issues with them.
Should i start with disabling SSIDs and enable one by one?
Which tools / apps i can install on my computer to diagnose an issue like this?
Thanks.
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Does anyone know what would cause a Port 445 RST from the internal network?  I ran a packet capture mirroring the external interface and they appear to be from the internal network and what is interesting is that one source IP that we're seeing, we have it dropped or send to null 0 on the core routers so not sure why would we still see any packet from this network.
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Ok guys, you are my last hope.

I've been trying to replace an ISP provided router with an OpenBSD whitebox, but I'm having trouble. The connection is made over VLAN 101, and I can't get it working for the life of me.

These are the settings on the ISP router: settings0settings1settings2
# ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 32768
	index 7 priority 0 llprio 3
	groups: lo
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7
	inet 127.0.0.1 netmask 0xff000000
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr a0:36:9f:67:c1:3c
	index 1 priority 0 llprio 3
	groups: egress
	media: Ethernet autoselect (1000baseT full-duplex)
	status: active
	inet 10.0.0.186 netmask 0xffffff00 broadcast 10.0.0.255
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr a0:36:9f:67:c1:3d
	index 2 priority 0 llprio 3
	media: Ethernet autoselect (1000baseT full-duplex,master,rxpause,txpause)
	status: active
	inet 10.0.1.1 netmask 0xffffff00 broadcast 10.0.1.255
em2: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	lladdr a0:36:9f:67:c1:3e
	index 3 priority 0 llprio 3
	media: Ethernet autoselect (none)
	status: no carrier
em3: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	lladdr a0:36:9f:67:c1:3f
	index 4 priority 0 llprio 3
	media: Ethernet autoselect (none)
	status: no carrier
re0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	lladdr d0:50:99:21:80:dc
	index 5 

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I just purchased a Cisco RV130 to replace a Netgear R6400v2 wireless router. The Netgear router drops the internet at least once per day.  I have attached the Cisco router to a laptop and configured it exactly as the Netgear router. Spectrum is the ISV so both routers were set to Dynamically get the IP address. The only minor change is that both routers are set to be DHCP servers with a starting IP address of 10.0.0.1. The problem is when I finish and have the setup wizard test everything, after the WAN test finishes successfully it tells me the Cisco router cannot detect your internet connection. Any clue how to get passed this? I have the Netgear plugged back in so I can submit this question.
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We have tried connecting the Ubiquiti Switch 8 - 60W to several of our Juniper EX-3300 Switches and each time we get a link indication light on both devices that lasts less than half a second, then the link fails.  We have tried connecting to edge ports as well as uplink ports with Copper SFPs, disabling POE, setting the port as Access as well as Trunk and nothing works.

By contrast, we have never had this problem with the assortment of NetGear switches we have connected to Juniper Edge/Uplink ports.

Any suggestions, directions, or shared experience would be greatly appreciated.
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I am adding a Grandstream UCM6202 IP PBX on a network to use for an alarm notification system.  The network was previously closed and did not allow access to outside networks.  Alarm notifications were handled by an analog modem.  The updated alarm software is forcing me to install the IP PBX to allow
VOIP communications.  Full disclosure, I know absolutely nothing about VOIP technology.  I was given a box and a set of instructions.

My problem is that I need to identify the default gateway of the network, but none of the PC's on the network have it listed in the adapter settings.  The IP's are all static and the subnet mask is configured, but the gateway is not.  The IP PBX requires the gateway to allow communication with the outside world, so without that, I am dead in the water.  I thought that the gateway was usually the lowest numbered IP on the network, but in this case, it is not.  Is there a way to identify the default gateway without knowing where the router is physically located or the type of router it is?
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I was connecting my Centos server (physical) to a Comcast Internet router. The download speed of the internet connection when I tested was only 15 Mbs/s. When I connected a MAC laptop to the same port on the router, the speed was 90 Mbs/s. What on the router and the Centos server that may cause the speed to go down significantly?
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We are planning to upgrade old fashioned Network infrastructure and this primarily includes deploying new evolving Cisco SDA
The existing infrastructure is having Cisco switches.
The current is design is very simple. It consists of two 6509 Cisco switches as Collapsed core and Edge Switches consists of mixed 2960s and 3560s
Core switches are configured as HSRP Active/Standby and Active Core switch is root bridge for all vlans.

VLANs are segmented  as per department wise and all vlans are configured and spanned through out all switches.

The plan is to:
- Upgrade all switches
- Migrate from traditional network to SDA.
- Prepare

Hence, we need experts here to guide us on above points.
What strategies need to be considered?
How to perform the migration?

Appreciating any help and suggestions
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How to setup a failover WAN2 (ethernet 1) connection on Mikrotik

I have a Mikrotik Cloud Router connected to a fibre link (with 23 public IP addressees), each public IP is associated to one VLAN (23 VLANS in total).
DHCP server is enabled with 23 pools.
I have a 3G router that I would like to setup as failover option, using ethernet1 (interface).
I have attached few screenshots of my current configuration. I have hidden the public IP addressees for security reason.
Any suggestions would be supper appreciated.

INTERFACES2.png INTERFACES1.png ADDRESS-LIST2.pngADDRESS-LIST1.pngNETWORKS.pngDHCP.pngVLANS.pngINTERFACES2.pngINTERFACES1.pngROUTES1.png
ROUTES2.png
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If I want to setup SD-WAN between HQ & Branch Office, what are the requirements in terms of devices and licensing. Firstly, we need to setup POC by ourselves for demo purposes.
Both HQ and branch have 100 Mbps broadband internet connection. HQ also have dedicated leased for business use. As hardware is concerned, currently we got only ESXI hosts at both sites.

Any suggestions and ideas are welcomed.

Thanks
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Trying to replace a aging router with a ER6P.  The ISP for this site tags their traffic with vlan 221.  I was able to get the ER6P online using "vif" commands so that any device behind the ER6 would get out however, any port forwards or 1:1 NAT setups do not make it to the device.  

SETUP IS
ER6P - eth0 = 1.1.1.138/29 vif 221 - eth1 = 192.168.1.1/24
Device is on 192.168.1.2

TESTING IS
Port forwarding 3389 to 192.168.1.2 3389

What I'm seeing is that in my lab is not what I'm seeing at this site I'm working at, the only thing I can't test is the ISP vlan tagging of 221.  Is there anyone that can help?
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I have a Netgear R6400v2 wireless router connected to my Spectrum cable modem. At least once per day this router locks up. I loose internet connection and I cannot even get a response from the router. The control panel is no longer reachable. The only corrective measure that brings it back on line is to power it off and back on. I have tried tweaking settings as per their support site. Before I vanquish this router to the trash heap are their tips I could try to stop the locking up?
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Dear Experts, we have problem of high CPU process in Cisco 2960 switch (core 3).

We saw the problem is due to the HULC LED process but dont know how to fix it. Can you please suggest?

CORE3#sh process cpu sorted
CPU utilization for five seconds: 31%/1%; one minute: 31%; five minutes: 31%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
 160    68678432    12264266       5599 14.88% 14.87% 14.88%   0 Hulc LED Process
 205      711476     5789330        122  0.47%  0.28%  0.25%   0 IP Input
 130     1192777      490653       2430  0.29%  0.29%  0.29%   0 hpm counter proc
  15      664721     2320338        286  0.29%  0.33%  0.35%   0 ARP Input
 166        1468         660       2224  0.23%  0.02%  0.00%   1 SSH Process
 171      718708       97952       7337  0.11%  0.12%  0.11%   0 HQM Stack Proces
 191      124439      218366        569  0.05%  0.02%  0.00%   0 CDP Protocol
 218      343549     4363165         78  0.05%  0.04%  0.05%   0 Spanning Tree
   8           0           1          0  0.00%  0.00%  0.00%   0 DiscardQ Backgro
   9           0           2          0  0.00%  0.00%  0.00%   0 Timers
  10          16         668         23  0.00%  0.00%  0.00%   0 WATCH_AFS

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Besides, we also noticed the flapping in log. And all LED lights are blinking like crazy
CORE3#sh logg
Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)

No Active Message 

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I am attempting to configure bgp peering between a Juniper SRX in HA and NSX using redundant interfaces.  There are 2 peers with associated different vlans (subinterfaces on the reth interface).  Peering is up, and the routing is in place (confirmed with ping tests), however TCP traffic is being throttled.  

throughput from the upstream to the bgp network is nominal (bidirectional)
throughput from any other reth subinterface to the bgp network is throttled. (bidirectional)

There are no dropped packets, and bidirectional traffic is seen at the sources and destinations.

Does anyone have any Ideas?  Thanks in advance.
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How to reset the password of admin user in Netgear Router?

I got Netgear Router whose admin password I have forgotten.  

The Netgear instruction says log in with ethernet cable to http://routerlogin.net/ with admin/password credentials.
I tried restarting the router bypassing off button for 30 seconds and waiting for 30 seconds and tried to log in again, still, it did not allow me to log in.
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HI Experts,
I cannot get out of Rommon mode, from my ASA 5505

Launching BootLoader...
Default configuration file contains 1 entry.

Searching / for images to boot.

No images in /
Error 15: File not found

unable to boot an image


Default configuration file contains 1 entry.

Searching / for images to boot.

No images in /
Error 15: File not found

unable to boot an image


Failsafe booting engaged.
Default configuration file contains 1 entry.

Searching / for images to boot.

No images in /
Error 15: File not found

unable to boot an image



CISCO SYSTEMS
Embedded BIOS Version 1.0(12)13 08/28/08 15:50:37.45

Low Memory: 632 KB
High Memory: 507 MB
PCI Device Table.
Bus Dev Func VendID DevID Class              Irq
 00  01  00   1022   2080  Host Bridge
 00  01  02   1022   2082  Chipset En/Decrypt 11
 00  0C  00   1148   4320  Ethernet           11
 00  0D  00   177D   0003  Network En/Decrypt 10
 00  0F  00   1022   2090  ISA Bridge
 00  0F  02   1022   2092  IDE Controller
 00  0F  03   1022   2093  Audio              10
 00  0F  04   1022   2094  Serial Bus         9
 00  0F  05   1022   2095  Serial Bus         9

Evaluating BIOS Options ...
Launch BIOS Extension to setup ROMMON

Cisco Systems ROMMON Version (1.0(12)13) #0: Thu Aug 28 15:55:27 PDT 2008

Platform ASA5505

Use BREAK or ESC to interrupt boot.
Use SPACE to begin boot immediately.
Boot interrupted.

Ethernet0/1
MAC Address: 442b.03ec.75b2
Link…
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One of our clients for whatever reason is not able to access their website from inside their network.
I tried whitelisting their domain on the router and their firewall.
 
I also created DNS forwarders on their server to point to their Website IP address.
I also put in a static DNS for google on one of the clients network settings. and still could not open up the website.

I'm running out of ideas!!
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7
Have site where there are two buildings connected by fiber with a WAN connection at both sides. Before I was involved, it seems there was never much thought about where different facilities are located - Phone System, Server Room, etc.

AT&T Symmetrical 1G fiber was run into one of the buildings (Spectrum cable on the other), but server room is across the parking lot. This has not been an issue for the LAN or any internal resources, as they primarily communicate amongst each other and can be configured to use any of the WAN connections as the default gateway.

The problem we are facing now is that I need to make a VM server in the building with Spectrum into a public-facing web application server on AT&T fiber WAN. I know this could be accomplished with port-forwarding to LAN IPs or within a DMZ, but I was thinking it would be easier to just create a VLAN on the two Cisco switches that simply carried over the Public subnet across the parking lot to a specific physical port. I would then hook the VM to a selected hardware NIC on the VMWare host with PCI Device Passthrough. Once I connect this Cat6 cable to the specific designated host port on the Cisco switch, it should just work... right?

Well, I least though so, but my simple tests are not showing connectivity to the public IPs. I think there must be something basic that is being overlooked.

I am not very experienced with Cisco routing, so this is very likely probability.

Here is a basic diag:

Diag
1

Routers

47K

Solutions

30K

Contributors

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.