Network Engineering Stack Exchange
Network Engineering Stack Exchange

Most Popular

more tags
1500 questions
6
votes
0 answers

E1 over SDH, CRC increasing

I'm Having problem with CRC on E1 interface, after I found clock slips, I have configured "network-clock-participate wic" and "network-clock-select". But I think that is not the cause of CRC, when I ping and packet loss occurs, its always 10…
pswolfwind
  • 61
  • 2
6
votes
2 answers

Sending Cisco NCS/Prime Infrastructure reports without encapsulating them in a zip

Is it possible to configure Cisco NCS/Prime Infrastructure to send reports via email without encapsulating them in a zip?
scottm32768
  • 776
  • 7
  • 21
6
votes
3 answers

Differences between MPLS and VPLS

Can someone explain to me what differences there are between MPLS and VPLS? Which one is the most efficient? Why? I’ve read that the only difference is layer of technology: 2 (VPLS) vs 3 (MPLS). Does that mean that the routing table is managed on…
Julien
  • 185
  • 1
  • 1
  • 8
6
votes
2 answers

What is "Twisted pair with loading" cable?

What is "Twisted pair with loading" cable ? please explain and if possible please share a picture. Thanks, Note: Below image is taken from: Data And Computer Communications - 8e - WilliamStallings
user5653890
  • 63
  • 3
6
votes
1 answer

Cisco WLC Mobility Group between 7.0.x and 7.5.x

Our customer has two Cisco WiSM(1) blades running code 7.0.x and wants to migrate to Cisco 5508 controller which have code version 7.5.x The WiSM(1) blades are EoL and they aren't able to run newer code than 7.0.x Cisco Wireless Solutions Software…
sam
  • 63
  • 6
6
votes
4 answers

When/Why to use OSPF?

This question has been hanging around in my head for a while; all the way from back in 2012, when we replaced our core network switch. This switch was actually a stacked pair of old 3Com 4900sx, and it was responsible for layer 3 routing between…
Joel Coehoorn
  • 504
  • 1
  • 4
  • 12
6
votes
2 answers

Switch Buffer Sizing

What is the relationship between a switches buffer size and the effect it has on latency? I am aware of the bufferbloat issue and understand that buffers that are too large in networks of slower BW (i.e. less then 1Gbps) can degrade performance, but…
earnThis
  • 125
  • 2
  • 6
6
votes
1 answer

Cisco 3620, installing nm-2fe2w

Is the WIC plug and play or are there commands that I need to run? The router is not showing the interfaces. I tried using the sh diag and it didn't show anything.
Brian
  • 61
  • 1
6
votes
2 answers

Simple Question: Does High Bandwidth usage affect Speedtest.net Results?

In an office building with 20-some employees, our internet service sometimes drops to about .3 Mbits/sec from 5 Mbits/sec. I use speedtest.net to test the speed. When the speed drops, how can I tell the source of the issue? Namely, are my speedtest…
tic
  • 63
  • 1
  • 3
6
votes
2 answers

Why is Cisco enforcing X:X:X:X::X for link-local addresses when the standard says FE80:/10?

This document shows that you can use one of these options: interface type/number ipv6 address ipv6-prefix/prefix-length eui-64 ipv6 address ipv6-prefix/prefix-length link-local <------format ipv6 address ipv6-prefix/prefix-length…
MiniMe
  • 415
  • 2
  • 11
6
votes
3 answers

Network Address Translation fundamentals

Could someone please help me understand the concepts of NAT? I thought I understood how this works, but I'm confused about there being two public addresses, as opposed to just one public internet address. My understanding on NAT is this: Inside…
BabyPython
  • 375
  • 2
  • 9
  • 16
6
votes
2 answers

What is the OID needed to generate a ssh crypto key on a Cisco switch or router running IOS using snmpset?

I have a few routers and switches that were deployed to remote locations and the crypto key was not generated before they were shipped, they are working and I have SNMPv3 write access to them but I want to ssh to them without having to travel to…
Garry Baker
  • 161
  • 1
  • 5
6
votes
3 answers

RA VPN notification

I've got a vendor that supports some specialized equipment, the network engineer before me set them up with remote access VPN terminating to a Cisco ASA 5510 so they can remotely administer/troubleshoot the system. The requirements is to get…
hyussuf
  • 467
  • 3
  • 11
6
votes
1 answer

TCP and Go-Back-N

While studying about TCP i notice that is very similar to Go-Back-N, but ,i think i'm missing something very important: In http://www.ccs-labs.org/teaching/rn/animations/gbn_sr/ we can see that in GBN , the server gives ack to every packet that…
user2637293
  • 283
  • 1
  • 2
  • 8
6
votes
5 answers

Inter-VLAN Routing

I am trying to configure inter-VLAN routing, but I can't route using MLS. I attached the image. Please check and give the answers. In switch0 I created VLANs 2 and 4; in switch1 only VLAN 3; in switch2 VLANs 5 and 6. I want to communicate between…
Robichayanzz
  • 63
  • 6
1 2 3
…
99
100