EIGRP Issue

cdowling_bm · ‎07-11-2016

Hi Folks,

I am building a multi-site network for a customer and am having an odd issue with EIGRP neighbors forming relationships with each other. I have 8 routers deployed which connect to each other via private connections (VPLS domain) from the service provider.

What I am seeing is that 4 of the routers form neighbors with each other and the other 4 form neighbors with each themselves. I would expect that all 8 routers would form relationships with each other but that's not the case.

I have confirmed that the AS is the same on all devices and all the networks are defined correctly. All of the routers can ping each other so I know there is definitely connectivity between them.

Any suggestions why this is happening?

Thanks.

paul driver · ‎07-11-2016

Hello

What is the physical topology setup, do you have a hub/spoke/full mesh etc...

res

Paul

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Paul

cdowling_bm · ‎07-11-2016

Hi Paul,

It's a full mesh topology with each router having a WAN interface (IP) in the same subnet, so essentially they are all in the same broadcast domain.

Thanks.

chrihussey · ‎07-11-2016

Could it be the VPLS network is propagating the multicast EIGRP hellos to the two groups of four routers and needs to enable something so that all sites see each others hellos. Just a guess.