CCNP Recertification

Posted on Monday, 23rd August 2004 by sean

In the last article about EIGRP, I’ll go over some of the show and debug commands relevant to the operation of EIGRP.
Show the established neighbours:

r0#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold [...]

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Posted on Thursday, 19th August 2004 by sean

There are many things that can be done to alter the behaviour of EIGRP. As we saw before, delay can be changed to make one link look worse than the other. Likewise, bandwidth can be changed, but since EIGRP uses the lowest bandwidth and the sum of delays, it makes more sense to [...]

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Posted on Sunday, 15th August 2004 by sean

When talking about DUAL, the stuck in active problem often comes up.
One of the final things I showed in the last article was the behaviour of a router trying to find a lost route when there was no successor. The router “went active” on the route to find a new successor. Cisco has [...]

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Posted on Saturday, 14th August 2004 by sean

EIGRP is easy to configure, but has a lot of options and can end up being very complex. Keep in mind that even though it looks and feels like a link state protocol, it is a distance vector protocol.
Here’s the network for the next few examples (pardon the hand drawing):

In addition, R2 and R4 [...]

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