nanog mailing list archives
Re: Open Source BGP Route Optimization?
From: Paul Jakma <paul () clubi ie>
Date: Sat, 29 May 2004 12:18:34 +0100 (IST)
On Fri, 28 May 2004, Bruce Pinsky wrote:
But the "optimizing" device wouldn't be advertising multiple paths. It would be advertising its selected path from all viable paths based on the selection criteria/policy implemented by the user. The optimizing device can then keep track of what it has advertised and withdraw as appropriate/necessary.
But how do the edge routers, which are passing on all their paths, pass on withdraws? The edge routers would have resend all routes after a withdraw (which current implementations do not do, obviously). Also, the optimising device would not be BGP compliant, an update of a route is an implicit withdraw, so the optimising device could not know, if given additional UPDATE messages for additional prefixes, whether the edge device still had the previous route or not. Essentially, it's impossible to do right with BGP at the moment. If it is possible, I'd love to hear how having previously tried to implement this (and failed). regards, -- Paul Jakma paul () clubi ie paul () jakma org Key ID: 64A2FF6A warning: do not ever send email to spam () dishone st Fortune: If you wish to succeed, consult three old people.
Current thread:
- Re: Open Source BGP Route Optimization?, (continued)
- Re: Open Source BGP Route Optimization? Andrew - Supernews (May 28)
- Re: Open Source BGP Route Optimization? Sam Stickland (May 29)
- Re: Open Source BGP Route Optimization? Olivier Bonaventure (May 29)
- Re: Open Source BGP Route Optimization? Alexei Roudnev (May 29)
- Re: Open Source BGP Route Optimization? Sam Stickland (May 29)
- Re: Open Source BGP Route Optimization? Per Gregers Bilse (May 28)
- Re: Open Source BGP Route Optimization? Arnold Nipper (May 28)
- Re: Open Source BGP Route Optimization? Per Gregers Bilse (May 28)
- Re: Open Source BGP Route Optimization? Bruce Pinsky (May 28)
- Re: Open Source BGP Route Optimization? Sam Stickland (May 29)
- Re: Open Source BGP Route Optimization? Paul Jakma (May 29)
- Re: Open Source BGP Route Optimization? Sam Stickland (May 29)
- RE: Open Source BGP Route Optimization? Michael Hallgren (May 29)
- Re: Open Source BGP Route Optimization? Stefan Mink (May 30)
- Re: Open Source BGP Route Optimization? Per Gregers Bilse (May 30)