[117466] in North American Network Operators' Group
Re:
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Mon Sep 14 13:40:51 2009
Date: Mon, 14 Sep 2009 19:39:12 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Michael Ruiz <mruiz@telwestservices.com>
In-Reply-To: <9F285BFE1D7757499D9FF095B4EE347D0444E7F3@tw-xchange01.TWC.local>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mon, 14 Sep 2009, Michael Ruiz wrote:
> I am having difficulty maintaining my BGP session from my 6509 with
> Sup-7203bxls to a 7206 VXR NPE-400. The session bounces every 3
> minutes. I do have other IBGP sessions that are established with no
> problems, however, this is the only IBGP peer that is bouncing
> regularly.
>
> What does exactly the message mean and how do I stabilize this? Any
> help will be appreciated.
This is most likely an MTU problem. Your SYN/SYN+ACK goes thru, but then
the first fullsize MSS packet is sent, and it's not getting to the
destination. 3 minutes is the dead timer for keepalives, which are not
getting thru either because of the stalled TCP session.
--
Mikael Abrahamsson email: swmike@swm.pp.se
