cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
6847
Views
0
Helpful
4
Replies

Eigrp - routing table refresh?

Eamon.Moran
Level 1
Level 1

Hi all

As anyone ever experienced a whole routing table refresh when just one route is unavailable. Eigrp neighbors are stable etc., and are not lost.

Thanks for any advice

mary

4 Replies 4

donewald
Level 6
Level 6

Mary,

I've not experienced this before. Are you saying that the entire EIGRP routing table is exchanged/updated and there is no neighbor loss or other topology change that you attribute this to? Can you share more information about your problem/question?

Thank you,

Don

Yes, the entire routing table is exchanged/updated with no neighbor loss or change. This appears to happen when only 1 wan ip route is lost. This only appears to happen on the 4500 routers,. Other routers on the same lan do not experience this routing table update.

Mary,

The only EIGRP function that would do this is the SIA (Stuck in Active). This is where a route is lost from the topo table and goes into an Active State "show ip eigrp top active" waiting for a query to return. If this query does not return from a specified neighbor within the active time (default is 3 minutes) then the route is considered SIA (stuck in active) and is purged from the routing table and (here's the kicker) the neighbor that did not reply is reset. This neighbor reset will expunge and repopulate all routes within the topo table. If you have log adjacency changes in your config you should see this neighbor loss though.

Any of this help or point you in a direction to help?

Don

aleksio.g
Level 1
Level 1

clear ip route *

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco