mailing list archives
Re: Anyone notice strange announcements for 188.8.131.52/24
From: "Tim Franklin" <tim () pelican org>
Date: Wed, 14 Jan 2009 10:50:23 -0000 (GMT)
On Tue, January 13, 2009 8:57 pm, Joe Abley wrote:
The fact that I choose to stick 701 in an AS_PATH attribute on a
prefix I advertise in order to stop that prefix from propagating into
701 is entirely my own business, and it's a practice which, although
apparently not commonplace, has been a well-known part of the IDTE
toolbox for many years.
This does seem to be an interesting question.
I'm AS X, I have no contractual relationship with AS Y, or indeed any
informal peering relationship with them. All of my connectivity with AS Y
is via at least one other AS.
For whatever reason, technical, political, or pure whim, I don't want AS Y
to receive any of my announcements.
What's the correct tool to do this?
Other than AS-PATH, I can't see a reliable way to do this currently. Lots
of my peers or transits may have communities I can set to request that
they don't announce my routes in particular regions, at particular peering
points etc, but they almost certainly don't have one to restrict
announcements to a specific AS.
Do we need a set of well-known communities XXXXX:AS that can be recognised
everywhere as "do not announce to AS"?