Re: how about a well-known DOWNGRADE BGP Community? (Was: RTBH Support Across the Industry)

[Saku Ytti via NANOG <nanog () lists nanog org>]

On Wed, 5 Aug 2026 at 00:01, Lukas Tribus <lukas () ltri eu> wrote:

> Take an ASR9000 for example. A basic implementation that sets a
> ingress qos-group/cos/dscp/exp bit for the attacked /32 and has an
> egress queue configurations which deprioritizes scavenger traffic can
> do nothing in a DoS situation.

I don't think this is true.

You set 'priority level 1' for NC+AF, 'priority level 2' for BE, and
leave LE unset on the ingress policy.

This sets the fabric priority, and VoQ will honor it.

-- 
  ++ytti
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