[53381] in North American Network Operators' Group
Re: all the mails on Filtering
daemon@ATHENA.MIT.EDU (Harsha Narayan)
Wed Nov 13 13:30:54 2002
Date: Wed, 13 Nov 2002 10:25:53 -0800 (PST)
From: Harsha Narayan <hnarayan@cs.ucsd.edu>
To: <nanog@merit.edu>
In-Reply-To: <Pine.SOL.4.40.0211131720520.19438-100000@share1.wobnma1-dc1.genuity.net>
Errors-To: owner-nanog-outgoing@merit.edu
Hi,
So what happens to multihoming assignments made by the ISP? That means
the multihoming assignment can't be used as a backup. If the customer's
connection to the ISP which made the multihoming assignment gets lost,
then it can't use its multihoming assignments (say a /24) to get traffic
from some other ISP?!
Thanks to all,
Harsha.
On Wed, 13 Nov 2002, Buddy Bagga wrote:
> Greets,
>
> Look at <http://www.nanog.org/filter.html>. If I remember correctly, Verio
> used to filter prefixes longer than /19s in classful A range. Apparently
> this isn't the case anymore. But it would be naive to think that ISP only
> filter prefixes longer than /24.
>
> Cheers,
>
> On Wed, 13 Nov 2002, Harsha Narayan wrote:
>
> > Are there some ISPs who filter prefixes longer than /19 or a /20?. I
> > thought they filtered only prefixes which are longer than /24?
>
> ~
> Buddy Bagga
> Genuity | BBN
>
