multiple origin ASes

Wed Jan 10 04:12:22 UTC 2001

Abha,

One of the origins :) of inconsistent routes is improper multihoming --
a network is multihomed but no public ASN is assigned to it; some private
ASN is used and stripped off (by remove-private-as) at the edges of
the both (or many) ISPs, which results in multiple origin ASs for the
network prefix. I don't know how intentional this practice is, though :)

The question about how bad inconsistent routes are was also addressed
on this list.
--
dima.

> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
> abha
> Sent: Tuesday, January 09, 2001 7:02 PM
> To: nanog at merit.edu
> Subject: multiple origin ASes
>
>
>
>
> Hi All!
>
> I'm trying to get a feeling for how often ISPs announce a prefix from
> different origin ASes intentionally....  (and why...)
>
> I asked this question on my peering survey (*grin*), but I thought i'd hit
> a wider audience...
>
> Thanks.
>
> -abha ;)
>