[157903] in North American Network Operators' Group
Re: What is BCP re De-Aggregation: strict filtering /48s out of /32
daemon@ATHENA.MIT.EDU (William Herrin)
Wed Nov 14 13:06:58 2012
In-Reply-To: <416A23FC91E34449999D047BF540B46901689658E2FB@EXCHANGE.atlasbiz.com>
From: William Herrin <bill@herrin.us>
Date: Wed, 14 Nov 2012 13:06:22 -0500
To: "Ben S. Butler" <Ben.Butler@c2internet.net>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, Nov 14, 2012 at 12:08 PM, Ben S. Butler
<Ben.Butler@c2internet.net> wrote:
> Yes, nice. But... It does not address the case when this is
>not the ISPs customers but the ISP (read content provider)
>that operates globally but without a network interconnecting
>their routers.
Hi Ben,
That case is covered by things like ARIN's multiple discrete networks
policy which permit an ISP /32 or end-user /48 for _each_ distinct
network. There are plenty of addresses in IPv6. You should be break up
a /32 for traffic engineering purposes, not for the sake of handling
multiple disconnected sites. And when exercising TE, you can offer a
covering route and expect the network as a whole to still function
regardless of other folks' suballocation filtering.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
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