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Re: EIGRP邻居翻动有那些情况?

There are actually 3 ways in which neighbor-ship would flap: neighbor-ship is torn down and rebuild OR neighbor-ship is resync-ed OR neighbor-ship is flapping.

When does neighbor-ship tear down?

- Hold timer expires

- Retried over 16 times

- Authentication is configured or removed

When does neighbor-ship resync?

- When 'no auto-summary' is configured after 'network'

- When 'ip summary-address' is configured

- When 'maximum-paths' is configured

- NSF is restarted

- NSF is configured

- Applying distribute-list

- Interface delay is changed

- Interface bandwidth has changed

When does neighbor-ship flap? There can be a lot of reasons and the cause may not come from the router itself. E.g A route is in SIA, and the neighbor is torn down due to late response, and then come back up again and down. Another example would be a flapping interface, which is the only way to connect to a neighbor, therefore the adjacency between that router and this one comes up and down and up and down.

Regards,

Angela

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Re: EIGRP邻居翻动有那些情况?

thanks,very good !

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