ISP customer assignments

Fri Oct 16 01:06:57 UTC 2009

On Thu, Oct 15, 2009 at 8:17 PM, Chris Adams <cmadams at 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 at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004