BGP Graceful Restart
lobna_gouda at hotmail.com
Sat Apr 17 19:30:17 UTC 2021
I had a chance to analysis this topic GR and GR helper mode( default) for EoR msg and for the LLGR timer afterwards and had e-mail correspondence with the RFC auther.
I would say based on your environment topology and the type of BGP fault/error. You keep the default mode unless BFD is configured. Even if you donot have GR configured. There is benefit to help your neigh ( if no BFD) in the restart process based on the type of peering relation.
Now, to enable GR itself. You have to know what are you doing and why and where in the network it is actually enabled. Still, you don't enable it where BFD is configured.
From: NANOG <nanog-bounces+lobna_gouda=hotmail.com at nanog.org> on behalf of Graham Johnston <johnston.grahamj at gmail.com>
Sent: Friday, April 16, 2021 10:11 AM
To: nanog at nanog.org <nanog at nanog.org>
Subject: BGP Graceful Restart
I do believe that I understand the intended purpose of BGP
graceful-restart. With that said, I was watching a video of a talk
given by someone respected in the industry the other day on the use of
graceful-shutdown and at the beginning of the talk there was a quick
disclaimer that his topic had nothing to do with graceful-restart
along with some text on the slide that provided me a clear indication
that he was not a fan of graceful-restart.
Largely, I suspect that his point was that if you otherwise do the
right things during maintenance that graceful-restart has the
potential of being really problematic if things go wrong, and thus he
was discouraging the use of it. Is there consensus as to whether
graceful-restart has any place in a service provider network?
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