On Tue, May 27, 2008 at 9:53 AM, Lixia Zhang <[EMAIL PROTECTED]> wrote: >> On Tue, 27 May 2008, Lixia Zhang wrote: >>> >>> As I've heard from a few big operators, their shared issue is the scale >>> limitation of their edge boxes --- they could buy a small number of core >>> routers that can handle large tables, but they could not afford replacing >>> hundreds or even up to thousands edge routers that have limited capacity.
> I might have used a wrong word "edge"; someone closer to operations might > help here. But the stories I heard are about the ISP routers that do carry > the full table. Lixia, It sounds like you used the right term. "Edge" generally means customer edge, but in a large operator those customers are often BGP participants. If I read you right, what they're saying is that they could accept upgrading a few very large routers in their core where they talk to major peers but would find it cost-prohibitive to upgrade all the routers that talk to what are now BGP customers. This is a blind alley. See Randy Bush's NANOG presentation, page 47+ http://www.nanog.org/mtg-0710/presentations/Bush-v6-op-reality.pdf Regards, Bill Herrin -- William D. Herrin ................ [EMAIL PROTECTED] [EMAIL PROTECTED] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
