nanog mailing list archives
Re: BCP38 making it work, solving problems
From: Niels Bakker <niels=nanog () bakker net>
Date: Tue, 12 Oct 2004 10:49:13 +0200
* christopher.morrow () mci com (Christopher L. Morrow) [Tue 12 Oct 2004, 05:18 CEST]:
a common occurance we've seen is a customer of a customer NOT announcing , nor planning on announcing, their routes to their upstream#1 which they use ONLY for outbound traffic (cheap transit for instance, and perhaps only for some portions of their total sources) though they announce to upstreams#2-N the proper sources to gather the return traffic. These things make uRPF 'difficult'.
You could use uRPF-loose there, or the customer could do: ! route-map outbound-only permit 10 match prefix-list myprefixes set community no-export ! And bash the people who, in this age, don't have "neighbor x.y.z.a send-community" on all their BGP sessions. -- Niels (who recently had a CCIE claim that he was "not aware of a single ISP accepting communities from its peers" - well, my experience begs to differ, with his employer a rare and lonely exception to the rule)
Current thread:
- Re: BCP38 making it work, solving problems, (continued)
- Re: BCP38 making it work, solving problems Fergie (Paul Ferguson) (Oct 10)
- Re: BCP38 making it work, solving problems Dan Hollis (Oct 10)
- Re: BCP38 making it work, solving problems Randy Bush (Oct 11)
- Re: BCP38 making it work, solving problems Edward B. Dreger (Oct 11)
- Re: BCP38 making it work, solving problems Richard A Steenbergen (Oct 11)
- Re: BCP38 making it work, solving problems Daniel Senie (Oct 11)
- Re: BCP38 making it work, solving problems Richard A Steenbergen (Oct 11)
- Re: BCP38 making it work, solving problems Daniel Senie (Oct 11)
- Re: BCP38 making it work, solving problems Suresh Ramasubramanian (Oct 11)
- Re: BCP38 making it work, solving problems Christopher L. Morrow (Oct 11)
- Re: BCP38 making it work, solving problems Niels Bakker (Oct 12)
- Re: BCP38 making it work, solving problems Christopher L. Morrow (Oct 12)
- Re: BCP38 making it work, solving problems Paul Vixie (Oct 12)
- Re: BCP38 making it work, solving problems alex (Oct 12)
- Re: BCP38 making it work, solving problems Steven Champeon (Oct 12)
- Re: BCP38 making it work, solving problems alex (Oct 12)
- Re: BCP38 making it work, solving problems Suresh Ramasubramanian (Oct 12)
- Re: BCP38 making it work, solving problems Steven Champeon (Oct 13)
- Re: BCP38 making it work, solving problems Fergie (Paul Ferguson) (Oct 10)
- Re: BCP38 making it work, solving problems JP Velders (Oct 19)
- Re: BCP38 making it work, solving problems Fred Baker (Oct 19)
- Re: BCP38 making it work, solving problems Randy Bush (Oct 19)