[175864] in North American Network Operators' Group
Re: Default routes on BGP routers with full feeds
daemon@ATHENA.MIT.EDU (William Herrin)
Wed Nov 5 14:39:51 2014
X-Original-To: nanog@nanog.org
X-Really-To: <nanog@nanog.org>
In-Reply-To: <20141104174735.C85252D40FD@mail.nanog.org>
From: William Herrin <bill@herrin.us>
Date: Wed, 5 Nov 2014 14:39:16 -0500
To: Berry Mobley <berry@gadsdenst.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Tue, Nov 4, 2014 at 12:47 PM, Berry Mobley <berry@gadsdenst.org> wrote:
> I'm wondering how many of you who are multihomed
> also add default routes pointing to your providers
> from whom you are receiving full feeds.
>
> If so, why? If not, why not?
Back when I worked for the DNC we ran into a problem with the TCAM size.
Given the DNC's focus on the U.S., network reliability to the /8's operated
out of the APNIC and RIPE regions was much less important to us. So, we
filtered BGP announcements from within those /8's and relied on covering
routes to get our packets there instead.
I used covering /8's instead of a default, but a default would have been as
effective.
Regards,
Bill Herrin
--
William Herrin ................ herrin@dirtside.com bill@herrin.us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
May I solve your unusual networking challenges?
