nanog mailing list archives

Re: AS prepending

From: Patrick W Gilmore <patrick () ianai net>
Date: Fri, 8 Apr 2005 10:34:05 -0400


On Apr 8, 2005, at 10:28 AM, Philip Lavine wrote:

I am using AS prepending to favor one ISP over
another, in a BGP multihomed/multiISP scenario. Why
does the ISP receiving the prepends fail to add my
network into their routing table? Is this a "feature"
of BGP, or have I gone too far with 3 prepend
statements.


If they are both transit providers, then they are broken.

If they are peers, the second ISP is probably preferring the route ithears through your transit provider because there are fewer AS hops.


--
TTFN,
patrick

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)