eigrp info question

Answered Question
Jun 18th, 2007

Hi

We have a managed router that's running eigrp. I'm also running eigrp using the same eigrp routing number e.g "router eigrp 1", I'd like to know what routes they are holding in their cofiguration, is there a way to find this out? given that I don't have access to the router itself. I'm thinking of the lines of debugging.

Thanks

Dan

I have this problem too.
0 votes
Correct Answer by lgontarsk about 9 years 5 months ago

Each router shows received eigrp advertisements in the eigrp topology table.... each router's topology table is specific to that router - unlike ospf where the entire spf tree is visible in each router within an area.

Show ip eigrp topo will show you the general database, and show ip eigrp topo will shows you detailed info about each entry in the topology table.

Of course knowing that doesn't help you too much, since you can only see each router's topo table by logging into that specific router. looks like you need access to the router in question.

Lisa G

Correct Answer by s.arunkumar about 9 years 5 months ago

i think from topology table(sh ip eigrp topology all-link) u can get some info,but u need to work out more on it...

or as u mentioned reset the connection with neighbor by "clear ip eigrp neighbors "

and then a debugging by "debug eigrp fsm" or "debug eigrp packets update"

let hear from experts too.... :)

... arun :)

Correct Answer by Richard Burts about 9 years 5 months ago

Dan

EIGRP will advertise to its neighbors all the EIGRP routes that it is using. If you do the show ip eigrp topology command you should be able to find in the topology table all the routes the neighbor has advertised to you, whether you have put those routes into your routing table or not. This is the closest that I can think of a way to find what the neighbor has in their table without having at least user level access on the other router. Note that this will give you the EIGRP routes but not any static routes, BGP routes, etc.

HTH

Rick

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Correct Answer
Richard Burts Mon, 06/18/2007 - 07:11

Dan

EIGRP will advertise to its neighbors all the EIGRP routes that it is using. If you do the show ip eigrp topology command you should be able to find in the topology table all the routes the neighbor has advertised to you, whether you have put those routes into your routing table or not. This is the closest that I can think of a way to find what the neighbor has in their table without having at least user level access on the other router. Note that this will give you the EIGRP routes but not any static routes, BGP routes, etc.

HTH

Rick

Correct Answer
s.arunkumar Mon, 06/18/2007 - 07:16

i think from topology table(sh ip eigrp topology all-link) u can get some info,but u need to work out more on it...

or as u mentioned reset the connection with neighbor by "clear ip eigrp neighbors "

and then a debugging by "debug eigrp fsm" or "debug eigrp packets update"

let hear from experts too.... :)

... arun :)

dan_track Mon, 06/18/2007 - 07:32

Hi

Where can I enter the topology table command in? it doesn't show up in the auto complete listing?

Thanks

Dan

lgontarsk Mon, 06/18/2007 - 07:36

from the router priveleged level.

ourhostname#show ip eigrp topo

IP-EIGRP Topology Table for AS(1)/ID(172.31.255.69)

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

r - reply Status, s - sia Status

P 66.174.226.12/30, 2 successors, FD is 310556416

Richard Burts Mon, 06/18/2007 - 07:40

Dan

You can enter the command show ip eigrp topology detail at the command prompt. It is available in user mode and in privilege mode.

HTH

Rick

Correct Answer
lgontarsk Mon, 06/18/2007 - 07:28

Each router shows received eigrp advertisements in the eigrp topology table.... each router's topology table is specific to that router - unlike ospf where the entire spf tree is visible in each router within an area.

Show ip eigrp topo will show you the general database, and show ip eigrp topo will shows you detailed info about each entry in the topology table.

Of course knowing that doesn't help you too much, since you can only see each router's topo table by logging into that specific router. looks like you need access to the router in question.

Lisa G

s.arunkumar Mon, 06/18/2007 - 20:39

"show ip eigrp topology" will only give the routes which are selected as successors and feasible successors;those which have not met feasible condition will also be there in topology table,which can be viewed with "show ip eigrp topology all-link" .Since you have to find possible routes entry present in your neighbor ,i think this cmd will be more helpful than,"sh ip eigrp topology".

...... arun :)

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