[191509] in North American Network Operators' Group
Customers announcing communities to SP of SP
daemon@ATHENA.MIT.EDU (Jason Lixfeld)
Mon Sep 19 12:00:44 2016
X-Original-To: nanog@nanog.org
From: Jason Lixfeld <jason+nanog@lixfeld.ca>
Date: Mon, 19 Sep 2016 12:00:36 -0400
To: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Hi,
Consider the following scenario:
- Customer A is a customer of SP A
- SP A is a customer of SP B
- SP B has a traffic engineering community implementation=20
With regards to using BGP communities for TE:
- Does SP A write their own community implementation that maps to (some =
portion of) the community implementation of SP B?
- Does SP A write their own community implementation that has no =
mappings at all to the community implementation of SP B; any TE that is =
required to be pushed to SP B is done by some dialog and coordination =
between Customer A and SP A?
- Does SP A allow Customer A to announce prefixes tagged with SP B=E2=80=99=
s communities[1][2]
- Is this sort of thing really complicated today, but one of the goals =
of draft-heitz-idr-large-community?
[1] Customer A has knowledge of SP A=E2=80=99s upstream SP B
[2] This opens up a can of worms where SP A or SP B implements some =
communities prefixed with reserved ASes, so we=E2=80=99ll assume that SP =
A implements some method of allowing communities prefixed with ASes of =
SP A and SP B only.
Thanks!=
