[49019] in North American Network Operators' Group
Re: query about determining ingress interface
daemon@ATHENA.MIT.EDU (Stephen J. Wilcox)
Thu Jun 20 18:37:53 2002
Date: Thu, 20 Jun 2002 23:35:42 +0100 (BST)
From: "Stephen J. Wilcox" <steve@opaltelecom.co.uk>
To: Randy Bush <randy@psg.com>
Cc: nanog@merit.edu, Rajesh Talpade <rrt@research.telcordia.com>
In-Reply-To: <E17L9mP-000Loc-00@rip.psg.com>
Errors-To: owner-nanog-outgoing@merit.edu
indeed, altho you will have to go back to filters if you want to do this
on an IP more than a couple of hops away, I tend to find most of my peers
allow it a little way into their network and it either stops or it stops
at the next network boundary..
Steve
On Thu, 20 Jun 2002, Randy Bush wrote:
>
> > Is there a way for an ISP to determine the ingress router interface at
> > its network border that will carry IP traffic _from_ an IP address not
> > owned by it?
>
> traceroute -g, which is what insisting on lsr is all about
>
> randy
>
>
