North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: BCP38 making it work, solving problems
* [email protected] (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)
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