Re: [Idr] WG adoption call for draft-abraitis-bgp-version-capability-08, to end September 25

[Jeffrey Haas <[e-mail]>]

On Sun, Jan 15, 2023 at 07:28:33PM +0000, Jakob Heitz (jheitz) wrote:
> I can agree to using a new BGP OPEN Optional Parameter.
> 
> I would add that if after receiving the OPEN message, the BGP neighbor closes the session
> with “Unsupported Optional Parameters”, that the sender of that OPEN message try
> opening the session again without the version parameter.
> 
> Graceful restart is affected. When a restarted session is restarted a second time,
> stale markings are removed. To prevent that, when a neighbor has previously restarted a session
> due to not supporting the new version parameter, a session that is restarted due to GR should not
> include the version parameter.

Whereas for exactly these reasons, I wouldn't want it in the optional
parameter.

John Scudder made most of the arguments I'd be supporting.  This is
optional, and capabilities say you should be ignoring things you don't
understand anyway.  Why force the implementation to hang up the session?

-- Jeff