Networking

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Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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If a network interface card on a laptop does not have the country code information  utilized by an access point, would that prevent it from communicating with the access point? I am aware that the country code information is delivered in frames called beacons and probe responses.
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What is a data plane, in terms of wireless networking?

This is what I found so far on the subject: https://searchnetworking.techtarget.com/definition/data-plane-DP
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As background:
This is about a testbed for DCs getting ready for a 2-site/s-subnet real-world network.
Here is a diagram of the testbed:TestbedI'm not at the stage where SERVER2 is being integrated but I'm not sure about expectations, terminology, etc.

One of the objectives is that if one site disappears, the other site has to continue operations.  
This first objective implies that the DCs operate independently or independently/synchronized.

Another objective would be that if one DC goes down, the entire system continues to operate - including the site with the downed DC - relying on the remaining DC.

As shown, the sites are integrated in the sense that there is communication between them, file sharing between them, etc.
I believe that using something like DFS would simplify the file serving split between sites and force files to be "local" - in case of failure or disappearance.

So, here is my question:
As I introduce SERVER2 into this network as shown in the diagram, being that it's the 2nd DC to be promoted, what is it called?  what is its role?  can all the objectives be met?  How to prepare it properly for this?  I have it almost done but that raises these questions.  I'm not looking for "step-by-step", rather the right words so I can more readily proceed.
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hp24 all in one pc (24-10066) suddenly has no wifi.  no wifi adapter listed in devices or in network settings either.  it was fine up until today.  i first thought someone enabled an airplane mode of some sort but i dont see where it is even accessed.  hp support has been useless.  a lot of standard, reboot, download driver system restore type stuff that did nothing... still no wifi adapter listed.  anyone run into this before?  thanks ;-)
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IP OSPF Network Point to Point on Frame Relay

os
I have configured IP OSPF Network Point to Point on R1,R2,R3 serial0 Interfaces.

however from R1 , I do not see both neighbors together, it keeps showing sometimes the 2.2.2.2 which is R2 and sometimes 3.3.3.3 which is R3
I am not sure why it is doing this flapping.

Any help will be very appreciated

Thank you

R1#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
3.3.3.3           0   FULL/  -        00:00:38    123.0.0.3       Serial0/0
R1#

Open in new window


R1#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -        00:00:38    123.0.0.2       Serial0/0

Open in new window



I wonder if the reason that neighborship is flapping because all 3 routers are in the same subnet, and Point to point requires that they need to be in separate subnets ?
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Network Type POINT_TO_MULTIPOINT  and POINT_TO_MULTIPOINT Non_Broadcast

I have configured  a serial interface with IP OSPF Network POINT_TO_MULTIPOINT then later with POINT_TO_MULTIPOINT Non_Broadcast,  then I realized in both cases when I run : show ip ospf interface s0/0, I see Network Type POINT_TO_MULTIPOINT[/b] only, there is no Non_Broadcast keyword added.

Any idea ?

Thanks

R1#sh ip ospf inte s0/0
Serial0/0 is up, line protocol is up
  Internet Address 123.0.0.1/24, Area 0, Attached via Interface Enable
  Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_MULTIPOINT, Cost: 64
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One of our users has a personal Macintosh computer that can't access any regular external Web sites when on our corporate network.

In Safari, she gets the message:

Access Denied.
Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect.

Other browsers produce a similar result.
 
Ping and DNS resolution work when the computer is connected to the corporate network.

The computer works can access Web sites normally when on a non-corporate network.

All other Macs on the network function corectly. We don't use a proxy server.

Panda antimalware turned off.

Any thoughts?

Tom
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Greetings,

I have a law firm client that is running on an On Premise Exchange 2013 system,  The host that the Exchange 2013 server is running on is a Windows 2012 R2 Standard  system.  The Exchange setup is a single-server system, where the CAS and Mailbox servers are installed and operating on the same physical host.  The Exchange version is Version 15.0 ‎(Build 1156.6)‎.

The issue we're actually having is on the front-end SMTP anti-spam server, which is a product called Interchange, made by LAN-ACES.  Incoming SMTP connections come into the Interchange server, and received emails are then relayed into the Exchange server and delivered to recipient mailboxes.  On the outbound side, mail from the Exchange server is relayed out through the Interchange server.  About 3 or 4 days ago, my client said that some contacts that were formerly regularly sending him emails without issue were now unable to send to him.  The contacts having issues are all Office 365 users.  When I reviewed the activity logs that detail the dialog between the Office 365 sending servers and the Interchange server, I saw the following:

Incoming connections from Office 365 servers that were within the 104.47.0.0 ip addressing subnet failed with the following conversation:

Connection from 104.47.56.59 port 25
SMTP -> 220 mail.mycompany.com ESMTP ready
SMTP <- EHLO NAM04-BN3-obe.outbound.protection.outlook.com
SMTP->250-OK, hello NAM04-BN3-obe.outbound.protection.outlook.com
SMTP <- 250-8BITMIME…
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Dell N3048P's switch connected route disappears and re-appears, causing intermittent issue.


 * Indicates the best (lowest metric) route for the subnet.

Default Gateway is x.x.x.x
S      *0.0.0.0/0 [1/0] via x.x.x.x,   21h:51m:28s,  Vl100
C      *x.x.x.0/24 [0/0] directly connected,   Vl100  -----------> this disappears and re-appears every minutes or so. When it disappears, it can't talk to certain resources.

I checked the switch and uplink ports and don't see any errors or misconfiguration.  Nothing int he log too.

thx!
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I want to monitor a cusromers network with wireshark to find the source of lan ping time spikes.

I dont have a dedicated PC on their network to run wireshark on.

They do have a PC that is on the network that runs the quickbooks database mangement. If I were to configure the switch to mirror all traffic out of the port this PC is connected to, will that cause the quickbooks file to be inaccesible. Basically Im asking if a mirrored switch port can still be used for normal network connectivity.

If I could mirror that port and then use wireshark to gather some data on it that would be useful.
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Hi, I am after some advice on management vlans on HP Procurve 2920 24POE switches please.
Our switches currently have 2 vlans, both vlans  (vlan 1 and vlan2) are being used for data.
The ip address and management of the switch was set via the setup tool so its being managed over vlan1
For security I plan to set up vlan 100 on port 24 to use for management purposes, the switches will all plug back into a cisco 2950 switch
We also have a few Cisco 2960 switches which I will also setup Vlan 100 and plug back into the Cisco 2950

Is this the best way to set up the management vlan on the HPs, or should I use the Front Management port that is present on the HP 2920s and plug all these back into my Cisco 2950 switch?
A quick google shows commands on how to enable the oobm management port, however it says

OOBM is not compatible with a management VLAN. If you attempt to enable OOBM when a management VLAN is enabled, the command will be rejected and you will receive an error message.
If an OOBM IP address exists and you disable OOBM, the OOBM IP address configuration is maintained. If you enable OOBM and there is a pre-existing OOBM IP address, it will be reinstated. Network OOBM is enabled by default.

Does this just mean that no other vlan interface can have an IP Address set against it?
If this is the case, can I still assign a vlan id of vlan 100 to the oobm, so that the Cisco 2960s can also be managed?

Hope that made sense?

Update:
On drawing it out, …
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If an access point is configured in french and the laptop network card is configured in english, can the laptop still communicate with he access point?
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“The 802.11s amendment proposes the use of a protocol for adaptive, autoconfiguring systems that support broadcast, multicast, and unicast traffic over a multihop mesh WDS.”

From: “CWNA Certified Wireless Network Administrator Official Deluxe Study Guide: Exam CWNA-106
by David A. Westcott; David D. Coleman”

I figure that different vendors may use different protocols, so what are some examples of protocols used by vendors like Cisco  when defining the above sentence?

Possible answer:https://www.cwnp.com/uploads/802-11s_mesh_networking_v1-0.pdf
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What are streams in wireless networking?
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Environment = Vcenter Version 6.7.0.20000 Build 10244845
ESXi host version = 6.7 U1 11675023


We are trying to add a Host to a new cluster that was just created.
We are going through the process and the Host is on the network, it tests successfully in the ESXi console.  WE can ping the IP and the gateway and dns.


Here is the Issue:
When we go through the wizard to add a new host to this cluster we get the certificate warning, and select "Yes" and go through and select a license and finish.  The task gets to 100% and then fails with the following error:

Cant add Host to Cluster - A general system error occurred: Unable to get signed certificate forhost name 'ESXi1.mydomain.com' ip 'xx.xx.xx': Error: Failed to connect to the remote host, reason = rpc_s_no_memory (0x16c9a012). (382312466)

Never seen this before, any ideas?
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Just install Windows 2016 Standard at my site.    10.100.5.12     255.255.255.0      GW 10.100.5.5    DNS       Already at the site is another server 10.100.5.11  same subnet mask  same GW and same DNS.      
From the new server I can ping the IP address of the older server- 10.100.5.11 and I get normal responses for IPv4 but when I ping the by computer name I get IPv6 responses. Don't understand that.    

Pinging from the old server by ip address yields the same successful IPv4 responses   and when I ping by name successfully IPv6 responses.      

The real problem is that remote sites cannot ping the new server by ip address and name and can ping the old one (2008r2) by name or IP address

Did I set something up wrong on the 2016 server to cause this problem?
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What is the correlation between virtual Nics and physicial nics?  I have  the following:
wrmnic0 - 10 gig fibre
wrmnic1 - 10 gig fibre both connected to my NAS
then
wrmnic 3,5,6 & 7 all connected on a VMswitch 2
wrmnic2 connected on vmswitch 1

I'm trying to add 2 more servers on the same vlan however, I don't have any more nic cards.  I have 4 ports on a seperate nic on the hardware but it's just not showing up.  
On my vmswitch2 I created VP port group and the server is up and running - but is the correct?  Will the traffic get slowed down.  I'm enclosing a screenshot
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Hello,
I need a .bat script to restart the network adapters.
It's for a standard user without administrator permissions and would need the way to enter credentials without the user being able to seeit.
Thanks,
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I already deployed two Windows Server 2016 "DNS Servers" a few months ago that are working fine, with DHCP IPs getting processed correctly, therefore I turned off my two old Windows Server 2008 "DNS Servers", with everything continuing to work correctly.

I have some REALLY old printers, etc that are almost never turned on, but I turned them on a few days ago, seeing that they still have the OLD static DNS Servers listed.

I can easily change the static DNS Servers, but wanted to see if I could create some type of pointer record, doing something like the below

 1. printer has old DNS Server 192.168.24.1 listed
 2. since this old DNS Server 192.168.24.1 no longer exists some type of POINTER record automatically forwards this DNS Server request to the new 192.168.24.2 that is on the same subnet/etc

Any ideas on how to setup the above POINTER on my Windows Server 2016 "DNS Servers" ?
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I have a conduit that needs to have a network cable run through it.  The length is 450 feet.  Is this too long for a CAT 5 of CAT 6 cable?  Any ideas on what I could do to make this scenario work?  I'm sure fiber would work but we are trying to do this ourselves and not have a telcom company do the work.
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Hi there all,
well my problem is that i have a small workgroup with a server. They are not in any domanin just same workgroup. The server is running standard edition 2016 and the computers are running windows 10 enterprise. I configured the server as a file server and then i shared a couple of folders. now here comes the issue. some forlders i want only one or two persons to acess but when i map the network folders to the workstation. every time i want to map another folder with a specific user diffrent that the first time i get connection error. i tried to looka rround and tried many pssible sollutions but none work. i tried to use net use in a cmd like this but like i said only one connection to the server is accepted at any time. please help :-)

net use o: \\10.0.0.10\user1  /user:SERVER\user1 user1123
net use p: \\10.0.0.10\user2  /user:SERVER\user2 user2123
net use q: \\10.0.0.10\user3  /user:SERVER\user3 user3123

Many thanks
Marc
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Sonicwall routing with multiple VPN's.  I currently have one network as my central point (Site A).  There are about 5 other networks (Site 1 - 5) with VPN tunnels to my central network (Hub & Spoke).  On the central Sonicwall is it possible to route traffic from Site 1 to Site 2 through Site A.  I am looking into Routes and Rules from VPN to VPN but not sure how to exactly accomplish this.
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My router shows my actual data rate is about half of the attainable rate. Is that poor enough that I should call the company? This is upstream, downstream's better:

Capture.JPG
Seems like it should be faster to me. This is with neither of us downloading or streaming. Thanks in advance for the advice.
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Hi,

 I am about to replace existing server with new server using newer server operating system and like to know if you would create a new local domain name in the new server or use existing domain name.
 For example, existing domain name is called "Hersheychocolate.local". Would you create a new domain name "Hershey.local" in the new server or keep the existing one?
 Is there an advantage of using existing domain name in the new server with respect to user file goes?
 Typically, before I replace the server, I dis-join the workstation PC, set up new server on the same network and join workstation PCs to the new domain name. Consequently a new user profile is created in C:\Users and I have to move files from "My Documents, Downloads, Favorites, Pictures, Videos" folders from old profile to new profile.
  What are the pros and cons?

Thanks.
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how to change object ip in cisco asm.
i have an object (server) with ip 10.10.10.10 , i have to change (edit) this to 10.10.10.11
is it enough to just edit server ip or  i need to change nat rule and extern ip too?
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Networking

94K

Solutions

67K

Contributors

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.