[178288] in North American Network Operators' Group
Re: v6 deagg
daemon@ATHENA.MIT.EDU (Sander Steffann)
Tue Feb 24 13:21:38 2015
X-Original-To: nanog@nanog.org
From: Sander Steffann <sander@steffann.nl>
In-Reply-To: <CAP-guGV=D7K5Ti5mprEH5HuPHfvtD3E4fPXY4jpqmusNzDQJGA@mail.gmail.com>
Date: Tue, 24 Feb 2015 19:16:51 +0100
To: William Herrin <bill@herrin.us>
Cc: North American Network Operators' Group <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Hi Bill,
> I don't fully understand the math yet but the algorithm doesn't smell
> right. As near as I can figure it may only be correct in a static
> system. If after convergence the disaggregate ceases to be reachable
> from the aggregate, there doesn't appear to be either enough
> information in the system or enough triggers traveling between routers
> for it to reconverge to a correct state.
If a network announces an aggregate when they can't reach all =
more-specifics then things will already be broken. Don't announce =
address space that you can't handle traffic for...
But true: without Dragon the more specific would still arrive via =
another path and it would still be reachable.
Cheers,
Sander
