[193941] in North American Network Operators' Group
Re: google ipv6 routes via cogent
daemon@ATHENA.MIT.EDU (Nick Hilliard)
Fri Mar 3 07:01:22 2017
X-Original-To: nanog@nanog.org
X-Envelope-To: <nanog@nanog.org>
Date: Fri, 03 Mar 2017 12:00:28 +0000
From: Nick Hilliard <nick@foobar.org>
To: nanog@nanog.org
In-Reply-To: <20170303115601.GE86663@excession.tpb.net>
Errors-To: nanog-bounces@nanog.org
Niels Bakker wrote:
> As I explained in the rest of my email that you conveniently didn't
> quote, it's so that you can selectively import routes from all your
> providers in situations where your router cannot handle a full table.
it can also break horribly in situations where the provider is providing
"transit" but doesn't provide full transit.
OTOH, if you are single-homed, it is highly advisable to accept a
default, the reason being that most transit providers provide bgp
communities with "don't advertise to customers" semantics. So if you're
single-homed and use a full dfz feed without default route, you will not
have full connectivity to all the routes available from the transit
provider.
Nick
