i have a FR hub-and-spoke network running EIGRP. Point-to-multipoint interface configured at hub router and point-to-point interface configured on spoke router. Recently, the eigrp routing table on spoke routers refreshed multiple times everday, FR circuit and eigrp neighbor always up. The router platform is 2503 and ios is 12.0(26). I never seen this problem before.
The first place to start is with a show ip eigrp events, and see what event occured that caused the routes to be changed. Note the timer in the routing table doesn't necessarily mean a lot. It's changed each time eigrp touches the route, whether it's to replace it, or just because it received an update that didn't change anything, so there's a lot of reasons that timer could change.
You may want to also take a look at "show ip eigrp neighbors" when you are seeing problems. PVC congestion can be an issue. If your Queue count (Q Cnt) is any number greater than zero you may have some PVC type problems. You can look for drops, particularly in your broadcast queue.
Also if you are running any traffic shaping/queuing it may have an effect. Do all the neighbors go down at the same time, or one at a time throughout the day?
Do you have log neighbor changes on? If so, why does it say the neighbors are dropping? There are four possible reasons:
-- Dead timer timeout, which means hellos and other eigrp packets are being dropped across the link. This probably indicates some sort of link failure.
-- The link is failing.
-- Retransmission timeout exceeded, which means the link is periodically failing to sucessfully transmit reliable packets, so EIGRP is retransmitting them enough times to kill the adjacency. This is normally a dirty link, or perhaps queues, or the like.
-- Stuck in Actives. These are generally caused by a wide query range combined with dirty or low speed links, possibly a router in trouble (fragmented memory, high cpu utilization, or lots of queries and not enough memory/cpu to handle the load).
If the neighbors are failing on a regular basis, you need to figure out which of these reasons is the culprit, and work from there.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.