EIGRP

[arvindai]

I am using EIGPP routing table with AS number 111, I need to determine what other routers are there in the AS with the same AS number. Is there a way to find this out.

 

[dgrizzard]

do a show ip eigrp topology to find out what is in your eigrp topology. Also, show ip route eigrp to see what eigrp routes are in your ip routing table. They are two different things, eigrp topology is routes learned via eigrp, the ip routing table is the list of routes your router is actually using.

 

[arvindai]

does show ip eigrp displays all the routers in a particular AS or does it only show connected routers. Also if a route is disappeared from the routing table, is there a way to look this information about what routes have been deleted from eigrp table.

 

[Quadratic]

show ip eigrp topology" won't give you routers, it will give you networks in the EIGRP topology, and routes to each them. For example, here's a network with three routers and four networks in EIGRP AS 111:

RouterA#sh ip eigrp topology 111
IP-EIGRP Topology Table for AS 111

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status

P 10.1.1.0/30, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 10.2.2.0/30, 1 successors, FD is 30720
via 10.1.1.2 (30720/28160), FastEthernet0/0
P 10.3.3.1/32, 1 successors, FD is 158720
via 10.1.1.2 (158720/156160), FastEthernet0/0
P 10.4.4.4/32, 1 successors, FD is 2565376
via 10.1.1.2 (2565376/2562816), FastEthernet0/0


You can also do "show ip eigrp neighbor [AS Number]" to see other routers in the AS which are connected to your router, but EIGRP routers are not necessarily aware of every router in the topology - it's not a true link-state routing protocol.

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