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From:
Job Snijders <job@bsd.nl>
Subject:
Re: bgpd: shorthand for DOWNGRADE community
To:
tech@openbsd.org
Date:
Thu, 24 Sep 2026 11:45:46 +0000

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On Thu, Sep 24, 2026 at 01:34:43PM +0200, Claudio Jeker wrote:
> On Thu, Sep 24, 2026 at 11:17:57AM +0000, Job Snijders wrote:
> > For https://datatracker.ietf.org/doc/html/draft-ietf-grow-downgrade-bgp-community
> > IANA assigned a new well-known BGP community. For now just provide
> > shorthand like (just like is done for other WKC).
> > 
> > OK?
> 
> OK claudio@
> 
> Do you want to add the draft to bgpd.8?

Not yet

> The question is how do we signal the LE DSCP towards those networks?

The primary goal isn't to signal LE DSCP, but to downgrade the
forwarding precedence. As a bonus, if we can also set DSCP LE on matched
packets that would be nice.

Maybe in bgpd.conf something via 'pftable', and then in pf.conf
'set prio 0' and 'set tos le'? 

I think we'd need a variant of 'pftable' that only adds the best paths
though. Thoughts?

Kind regards,

Job