nanog mailing list archives
Re: AS prepending
From: Pete Templin <petelists () templin org>
Date: Fri, 08 Apr 2005 10:35:40 -0500
Philip Lavine wrote:
Update: I am prepending my AS 3 times to the un-preferred ISP. Both ISP's are my peers. The un-preferred ISP claims the see my advertisement yet they do not add it to their routing table (suggests filtering??). They claim all the filtering they are doing is based on the networks I told them over the phone that I was using with that AS.
I have heard of providers who filter on AS path, and filter in such a way that more than N prepends (for varying values of N) causes the route(s) to be rejected. This could potentially be your problem. If they do soft-reconfig in on their customer sessions, they may see the route but filter it out.
pt
Current thread:
- AS prepending Philip Lavine (Apr 08)
- Re: AS prepending Patrick W Gilmore (Apr 08)
- Re: AS prepending Hank Nussbacher (Apr 09)
- Re: AS prepending Jon Lewis (Apr 08)
- <Possible follow-ups>
- Re: AS prepending christian . macnevin (Apr 08)
- Re: AS prepending Philip Lavine (Apr 08)
- Re: AS prepending David Gethings (Apr 08)
- Re: AS prepending Jon Lewis (Apr 08)
- Re: AS prepending Pete Templin (Apr 08)
- Re: AS prepending Philip Lavine (Apr 08)
- Re: AS prepending David Gethings (Apr 08)
- Re: AS prepending David Barak (Apr 08)
- Re: AS prepending Patrick W Gilmore (Apr 08)