Recent posts

The “do” Command

August 08, 2011 | 1 minute read

Don’t you just hate it when your in the middle of implementing a new configuration but then decide you’d like to issue a “show” or “ping” command so you drop down to privileged EXEC mode? For example: R2(config)#router eigrp 10 R2(config-router)# network 192.168.20.2 0.0.0.0 R2(config-router)#exit R2(config)#exit R2# R2#ping 192.168.20.1 Type e...

Dangers of the EIGRP “Neighbor” Command

August 06, 2011 | 5 minute read

I have touched on EIGRP a few times before and here we are again. In my EIGRP Route Advertising post I explained how EIGRP neighbor relationships can be created using the “network” command. In this post I will explain how they can be formed using the “neighbor” command and the dangers of using it as well. To do this, I’ll be using the followin...

EIGRP No Auto Summary Command, Part 1

May 28, 2010 | 6 minute read

In my previous post about EIGRP Route Advertisements I touched on the “no auto-summary” command, but did not delve in to the details of what this command actually does, so today I will. In a nutshell (see Part 2 for a more detailed explanation), when using EIGRP the “auto-summary” command (which is enabled by default), what happens is that the ...

EIGRP Route Advertising

May 15, 2010 | 2 minute read

In the forums that I frequently visit I always see people asking how EIGRP route advertising works. The users are not sure how to correctly use the “network” command and usually use more commands than are necessary. So in today’s post, using the diagram below, I will explain how to advertise EIGRP routes properly. Now before we get started let ...

Get Involved - Forums

April 18, 2010 | 2 minute read

Whether you are are a seasoned Cisco professional or just starting out, one of the best sources of information you will find (apart from this blog :P) are internet forums. You will be amazed at just how much you can learn from them, and, if you have the time, how much you can teach others too. It is also a great place to “network” (excuse the pu...