Noted, Saku.
I have seen that there has already been some interesting discussion
around this effort. I will start the call for adoption just after
sending this email.
Paolo
On 18/8/26 05:20, Saku Ytti [C] wrote:
We would like to ask the chairs to issue a call for WG adoption for
draft-spaghetti-grow-downgrade-bgp-community.
Thank you,
*
Sensitivity Label: General
From: *Job Snijders <[email protected]>
*Date: *Tuesday, 4 August 2026 at 16:43
*To: *[email protected] <[email protected]>; [email protected] <[email protected]>
*Subject: *A well-known DOWNGRADE BGP Community
Dear all,
Following up on a recent NANOG thread on RTBH [1], [2]; we'd like to put
forward an different strategy for DoS attack mitigation. Perhaps just as
an extra tool in the toolbox?
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.
Please read the full draft document here:
https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-
spaghetti-grow-downgrade-bgp-community__;!!MXpALLYS!
X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDJPK_vkbg$ <https://
urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-
spaghetti-grow-downgrade-bgp-community__;!!MXpALLYS!
X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDJPK_vkbg$>
Your feedback is most welcome!
Kind regards,
Job
[1]: https://urldefense.com/v3/__https://lists.nanog.org/archives/list/
[email protected]/message/LOWUU7RHOKTYKVGWRHNXQJ3GSJYN3HLE/__;!!
MXpALLYS!X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDIHqjrnGw$ <https://
urldefense.com/v3/__https://lists.nanog.org/archives/list/
[email protected]/message/LOWUU7RHOKTYKVGWRHNXQJ3GSJYN3HLE/__;!!
MXpALLYS!X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDIHqjrnGw$>
[2]: https://urldefense.com/v3/__https://lists.nanog.org/archives/list/
[email protected]/message/ITDOCC6N5VELZ56F6ILVZODZSUWH3TNE/__;!!
MXpALLYS!X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDJrzu7WUg$ <https://
urldefense.com/v3/__https://lists.nanog.org/archives/list/
[email protected]/message/ITDOCC6N5VELZ56F6ILVZODZSUWH3TNE/__;!!
MXpALLYS!X7AoyX_8bOX8vxJ0PGZ5A1BiURwy7o-
MMlve1xTf5tTnSPq2j9i7n7UQtbUXngzB5RorIDJrzu7WUg$>
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https://services.global.ntt/en-us/email-disclaimer <https://
services.global.ntt/en-us/email-disclaimer>
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