BGP Flapping due to closed TCP connection

Unanswered Question
Jun 10th, 2008

bgp connection is flapping and on checking the neighbor statstics we get following message - keepalive are termporarily in throtlle due to closed tcp window

I have this problem too.
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royalblues Tue, 06/10/2008 - 06:40

This mostly seems to an MTU issue.

What is the MTU configured on both ends?

Narayan

manish.gautam Tue, 06/10/2008 - 08:16

Thanks mate...yes it was MTU on one of the interfaces which was dissimilar...cheers.

manish.gautam Wed, 06/11/2008 - 06:22

just a doubt if can help with...i beleive MTU is negotiated while establishing a tcp connection and which ever is smaller from both the end interfaces is selected. so why did bgp have a problem ?

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