nanog mailing list archives
Re: consistent policy != consistent announcements
From: the Riz <riz () boogers sf ca us>
Date: Thu, 13 Mar 1997 11:54:40 -0800 (PST)
Vince Fuller wrote:
From our point of view, we aren't seeing any route which can be used forshortest-exit to your multi-homed customers. Why? Probably because we don't peer with the other ISP which serves those customers. The result is that we have to backhaul traffic to other interconnect points, something which is expensive for us and inconsistant with our normal peering policy. I can see why you present inconsistant routes to us but I'm not sure that I understand why you'd prefer a customer prefix via a direct connection to them at one point in your network but via a connection to another provider at a different point in your network. That would seem internally inconsistant to me. Is this deliberate behavior to do shortest-exit within your network toward your customer? --Vince
The scenario I can think where this would happen is using BGP route-reflectors internally to reduce the intermeshing requirements for IBGP peers. Since a route-reflector only propagates the best route, it is quite easy to get different as-paths in different parts of the network. Not an ideal situation, to be sure, but "correcting" this behaviour is more than a simple fix. +j -- Jeff Rizzo http://boogers.sf.ca.us/~riz - - - - - - - - - - - - - - - - -
Current thread:
- Re: consistent policy != consistent announcements, (continued)
- Re: consistent policy != consistent announcements Vadim Antonov (Mar 13)
- Re: consistent policy != consistent announcements Tony Barber (Mar 13)
- Re: consistent policy != consistent announcements Randy Bush (Mar 13)
- Re: consistent policy != consistent announcements Tony Li (Mar 16)
- Re: consistent policy != consistent announcements Sean Donelan (Mar 13)
- Re: consistent policy != consistent announcements Randy Bush (Mar 13)
- Re: consistent policy != consistent announcements John Scudder (Mar 13)
- Re: consistent policy != consistent announcements Vince Fuller (Mar 13)
- Re: consistent policy != consistent announcements Henry Kilmer (Mar 13)
- Re: consistent policy != consistent announcements David Schwartz (Mar 13)
- Re: consistent policy != consistent announcements the Riz (Mar 13)
- Re: consistent policy != consistent announcements Henry Kilmer (Mar 13)
- Re: consistent policy != consistent announcements Vince Fuller (Mar 13)
- Re: consistent policy != consistent announcements Henry Kilmer (Mar 13)
- Re: consistent policy != consistent announcements Vince Fuller (Mar 13)
- Re: consistent policy != consistent announcements David Schwartz (Mar 13)
- Re: consistent policy != consistent announcements Alan Barrett (Mar 13)
- Re: consistent policy != consistent announcements Randy Bush (Mar 14)
- Re: consistent policy != consistent announcements Alan Barrett (Mar 14)
- Re: consistent policy != consistent announcements John Scudder (Mar 14)
- Re: consistent policy != consistent announcements David Schwartz (Mar 13)
- Re: consistent policy != consistent announcements David Schwartz (Mar 14)
- Re: consistent policy != consistent announcements Vadim Antonov (Mar 13)