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Two routing protocols using same rtr ID cause duplicate rtr id in EIGRP?

Hi all,

I have observed logging of "Ignored route, dup router: 10.40.160.1"

in the EIGRP events in one of our L3 core switch. Both the OSPF & EIGRP seems to be using same router id:

4510-S1#sh ip eigrp topology

IP-EIGRP Topology Table for AS(29)/ID(10.40.160.1)

4510-S1#sh ip ospf data

OSPF Router with ID (10.40.160.1) (Process ID 100)

I know this (10.40.160.1) not being used anywhere in our network. OSPF being redistributed into EIGRP.

4510-S1#sh ip eigrp events

15 10:41:38.933 Poison squashed: 10.199.21.0/24 rt gone

16 10:41:38.933 RDB delete: 10.199.21.0/24 10.40.1.1

17 10:41:38.933 RDB delete: 10.199.21.0/24 10.40.2.1

18 10:41:38.933 RDB delete: 10.199.21.0/24 10.40.25.3

19 10:41:38.933 RDB delete: 10.199.21.0/24 10.40.11.1

26 10:41:38.933 Ignored route, neighbor info: 10.40.25.3 Vlan26

27 10:41:38.933 Ignored route, dup router: 10.40.160.1

No production issues anyway. But what causing the dup rtr id entries..?

Also what is the exxact meaning of:

Poison squashed: 10.199.21.0/24 rt gone

Thank you in advance

MS

1 REPLY
Hall of Fame Super Silver

Re: Two routing protocols using same rtr ID cause duplicate rtr

Hello Mehboob,

I would investigate on neighbor 10.40.25.3 on Vlan26.

the EIGRP router-id is exported only on external routes data structures where there is a field where it is placed.

So the effect should be on a route imported in EIGRP on the neighbor 10.40.25.3

Hope to help

Giuseppe

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