Internet-Draft draft-ietf-grow-downgrade-bgp-community-01.txt is now
available. It is a work item of the Global Routing Operations (GROW) WG of the
IETF.
Title: The DOWNGRADE BGP Community for Denial-of-Service Attack Mitigation
Authors: Job Snijders
Saku Ytti
Name: draft-ietf-grow-downgrade-bgp-community-01.txt
Pages: 9
Dates: 2026-09-24
Abstract:
This document outlines a method to mitigate Denial of Service (DoS)
attacks by using a well-known BGP community named "DOWNGRADE" as
signal to neighboring networks to treat traffic destined towards
"DOWNGRADE" tagged IP prefixes with low precedence. The "downgrade"
strategy offers an appealing alternative to Remote Triggered
Blackhole (RTBH) filtering, because RTBH filtering completes the DoS
attack and hampers the defender's ability to monitor whether the
attack is still ongoing.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-grow-downgrade-bgp-community/
There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-grow-downgrade-bgp-community-01.html
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-grow-downgrade-bgp-community-01
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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