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Community Member

Flaping

Hi

What these output means?

what is the Reason of this msg

how can i sole like this flaping

*Mar 1 00:14:53.095: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 120.120.120.8 (Ethernet0/1) is down: Interface Goodbye received

R6(config)#

*Mar 1 00:14:54.167: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 120.120.120.8 (Ethernet0/1) is up: new adjacency

10xs

3 REPLIES
Hall of Fame Super Blue

Re: Flaping

Hi Ali

It means that the EIGRP neighbourship between two routers connected to the same IP subnet is going up and down. This could be caused by a number of things. Are you shutting and bringing back up one of the interfaces ?

Jon

Community Member

Re: Flaping

Hi!

no it does without any things

10xs

Hall of Fame Super Blue

Re: Flaping

Ali

From Cisco doc

=============================================

The Goodbye Message

The goodbye message is a feature designed to improve EIGRP network convergence. The goodbye message is broadcast when an EIGRP routing process is shutdown to inform adjacent peers about the impending topology change. This feature allows supporting EIGRP peers to synchronize and recalculate neighbor relationships more efficiently than would occur if the peers discovered the topology change after the hold timer expired.

The goodbye message is supported in Cisco IOS Release 12.3(2), 12.3(3)B, and 12.3(2)T and later releases. The following message is displayed by routers that run a supported release when a goodbye message is received:

*Apr 26 13:48:42.523: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.1.1

(Ethernet0/0) is down: Interface Goodbye received

=============================================

This basically means that either the eigrp process was stopped on one of the routers or the network statement for the interface that the adjacency was formed on was removed from under the eigrp config.

It should not happen on it's own.

Jon

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