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mha
New Member

Dynamic routing disappear between MSFC (core) and edge router

Have EIRGRP running between core (msfc) and edge WAN router. What would cause dynamic routes to disappear?

MSFC Version 12.1(11b)E4

Edge Version 12.0(23)S3

config on edge:

ip route 10.78.0.0 255.255.0.0 Serial3/1.1

ip route 10.78.0.0 255.255.0.0 167.92.128.129 200

ip route 10.100.0.0 255.255.0.0 Serial3/1.1

ip route 10.100.0.0 255.255.0.0 167.92.128.129 200

ip route 10.101.0.0 255.255.0.0 Serial3/1.1

ip route 10.101.0.0 255.255.0.0 167.92.128.129 200

These routes disappear after we shut and no shut on serial3/1.1 interface (testing diaster scenario). We currently have static at both the core and edge.

Thanks.

3 REPLIES
Cisco Employee

Re: Dynamic routing disappear between MSFC (core) and edge route

Are you saying the static routes disappear when you shut/ no shut the interface or the EIGRP learned routes do? If the only EIGRP neighbor is out the serial3/1.1 then this would be expected until the neighbor relationship was reformed. Do the dynamic routes ever return? Also, if you have a static route with lower AD than the dynamic then the dynamic won't appear in the table. If you are referring to the routes above then that may be the case with your static routes to ser3/1.1

mha
New Member

Re: Dynamic routing disappear between MSFC (core) and edge route

The EIGRP neighbor relationship is thru the FastEthernet. The dynamic routes disappear from the core. The static never disappread on the edge. The dynamic routes in core never reappear even after a "clear ip route" issued. We haven't removed the static in core (workaround) yet.

This had worked before prior to this past weekend.

Silver

Re: Dynamic routing disappear between MSFC (core) and edge route

In Eigrp If you specify a directly connected interface as the next hop in a static route the router beleives these routes are directly connected if you are advertising the interface with a network statement the router will advertise these statics dynamically , This could be the reason the routes are disapearing , try set your next hop as an ip address .

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