EIGRP - Distributing Routes to Core from Multiple Devices

[jviggiano]

We have a Cisco Catalyst 3750-x stack core that's acting as our gateway on the network. That stack has a EIGRP relationship with a Cisco ASA 5515 and a Cisco 2921 Router. From the router we have a MPLS connection to a remote office that we are getting routing info from BGP and then distributing it into EIGRP which gets sent back to the core stack. We want to add a backup VPN connection from the Cisco ASA to the same remote office which will house another ASA. I've setup a reverse-route injection on the cryptomap and restributed static routes into EIGRP on the ASA so it would send back to the core stack. The issue becomes when both the router and the firewall are sending EIGRP routes for the same remote network subnet back to the core, the core doesn't see it as a primary/backup situation, but simply takes the info from the firewall and the info from the router is ignored. No EIGRP metrics have been modified. Any advice?

[Mark Malone]

These routes are in the same AS yes what does the show ip eigrp topology table show for the same route that's learnt in from each side ? The mtrics must be different for them for the ASA to be chosen as the path

[jviggiano]

Yes, they are the same AS. When both the ASA and the edge router are sending the info to the core, eigrp topology only shows the ASA with no feasible successor. If I kill the ASA routes, the router then shows up in the topology. It's just very.. odd.

[Mark Malone]

Does the core or router show anything in logs as to why the route may have been suppressed and not passed through any indication posion route etc

Does the router still show the route for the remote site in its own table anything odd about its output if its there in the topology table or route table ?

[jviggiano]

There's nothing in the core stack logs and the edge router does indeed have the remote site in it's routing tables properly. From the topology on the edge router, it shows itself as having the remote subnet properly.

[Mark Malone]

Im thinking its something to do with the design , are both sides using bgp on the vpmn as well, if so are the routes equal that come in before being redistributed back into eigrp on main site

If only one is bgp the router side , what does the core switch eigrp see the remote site routes as coming from each side internal or external when there working and in place ?

Is it possible to post some outputs from each side to see what's happening when working as it will give a much better indication of what your seeing exactly

[jviggiano]

There's only BGP on the router side. The core switch shows the routes as EIGRP External.