Re: <Keepalives are temporarily in throttle due to closed TCP window>

[Florian Weimer <fw () deneb enyo de>]

* Mikael Abrahamsson:

> > What does exactly the message mean and how do I stabilize this?  Any
> > help will be appreciated.
>
> This is most likely an MTU problem.

Does IOS enable PMTUD for BGP sessions by default these days?  The 476
(or something like that) MTU is unlikely an issue.  There could be a
forwarding bug which causes drops dependent on packet size, though.