Re: all the mails on Filtering

[Harsha Narayan <hnarayan () cs ucsd 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