[110069] in North American Network Operators' Group
Re: What is the most standard subnet length on internet
daemon@ATHENA.MIT.EDU (bmanning@vacation.karoshi.com)
Tue Dec 23 00:22:43 2008
Date: Tue, 23 Dec 2008 05:21:10 +0000
From: bmanning@vacation.karoshi.com
To: Nathan Ward <nanog@daork.net>
In-Reply-To: <85D6FED5-AB83-4AFD-940F-3A8386216CDB@daork.net>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Tue, Dec 23, 2008 at 02:08:25PM +1300, Nathan Ward wrote:
> On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
> >Anyone running a platform that can't take a full table would apply
> >such a filter to weed out anyone who likes to announce all of their
> >space as /24's for "traffic engineering". If one does that and
> >doesn't announce the aggregate as well, one could find themselves
> >facing random black holes.
>
>
> People are filtering /24s without a 0/0 route?
>
actually, you should ask the more general question,
"Are ISPs filtering when they don't have a 0/0 route?"
and i suspect the answer is almost certainly.
being default-free has its advantages as does not
using some variable RIR metric as a basis for routing
policy.
--bill
