On Fri, Jan 2, 2009 at 11:30 AM, Ross Callon <[email protected]> wrote: > Early on in this discussion engineers from multiple router vendors > stated publicly that that their engineers knew how to build routers that > would handle FIBs that were at least 4M entries or more (10M was > mentioned), using commodity hardware parts. It also became clear to > me that the router hardware engineers working on the hardware forwarding > parts of routers were not even considering any major change to the > architecture, for the simple reason that they didn't need to.
Ross, So, effective 2008 we can build routers that handle 4M routes. Effective 1995, we scrambled to deploy CIDR so that among other things we wouldn't hit the wall on our state of the art Cisco 7000 routers which IIRC could handle about 50k routes, that by stretching then-available hardware to its limits. Over 13 intervening years, that's somewhere between a compound rate of improvement of 40% per year and a fixed rate of improvement of 300k entries per year. If you fit a growth curve to http://bgp.potaroo.net/ , the BGP table size is growing at a compound rate of roughly 25% per year. If our ability to build routers is indeed compounding at 40% per year, the BGP table size will never catch it. If our ability to build routers is growing linearly by only 300k entries per year, the BGP table size will finally catch up with it in 2024 when the routing table has 8.5M entries. Yes? Regards, Bill Herrin -- William D. Herrin ................ [email protected] [email protected] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 _______________________________________________ rrg mailing list [email protected] https://www.irtf.org/mailman/listinfo/rrg
