[118244] in North American Network Operators' Group
Re: ISP customer assignments
daemon@ATHENA.MIT.EDU (William Herrin)
Thu Oct 15 21:07:55 2009
In-Reply-To: <20091016001754.GB793724@hiwaay.net>
Date: Thu, 15 Oct 2009 21:06:57 -0400
From: William Herrin <herrin-nanog@dirtside.com>
To: Chris Adams <cmadams@hiwaay.net>, NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, Oct 15, 2009 at 8:17 PM, Chris Adams <cmadams@hiwaay.net> wrote:
> With IPv6, we've got our single /32. From what I understand,
> if I try to advertise a /33 from the smaller POP, many (most?)
> will drop it (if my upstreams even take it). If I advertise the /32
> from both routers, when that link goes down, my IPv6 traffic
> will be pretty much hosed.
> Is there any good solution to this?
Chris,
Here's what I do with my IPv4 /24: I advertise it at higher priority
at the larger POP and a slightly lower priority at the smaller POP.
Then I got a small block of addresses from each upstream at each POP
(from their still-aggregated blocks) to anchor a set of VPNs between
the two. Something has to go disastrously wrong for me to suffer any
worse effects than the occasional inefficient routing.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
