[148299] in North American Network Operators' Group
Re: bgp question
daemon@ATHENA.MIT.EDU (Justin M. Streiner)
Tue Jan 10 23:53:38 2012
Date: Tue, 10 Jan 2012 19:58:09 -0500 (EST)
From: "Justin M. Streiner" <streiner@cluebyfour.org>
To: nanog list <nanog@nanog.org>
In-Reply-To: <CAAiP3237EFYNaZ2RqL7B53zBSsDCvS9BqdBDND6fur-Dzdx4Pw@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, 10 Jan 2012, Deric Kwok wrote:
> When we get newip, we should let the upstream know to expor it as
> there should have rule in their side.
Correct. Ideally, two things happen:
1. You tell your upstreams and peers about the new space, and they update
whatever prefix filters they have in place for your network.
2. You update you own outbound BGP filters wherever necessary so that you
can announce the new prefix, aggregated to the extent possible, when
you're ready.
> how about upstream provider, does they need to let their all bgp
> interconnect to know those our newip?
They might. It depends on the relationship your upstreams have with their
neighbors. Different providers have different criteria for what they'll
accept and how they manage their filters.
If your upstreams need to have their upstreams and/or peers update their
BGP filters, it is their responsibility to notify them. Note that this
can add to the amount of time it will take before your direct upstreams
are ready to accept and propagate your new prefix.
Some providers might require that your new prefix be registered in one of
several routing registries, and they'll update their filters based on your
new registry data.
jms
