On Jul 13, 2011, at 4:11 AM, Mikael Abrahamsson wrote: > On Wed, 13 Jul 2011, Ray Hunter wrote: > >> So where's the limit for ND and prefix length on today's implementations and >> platforms? > > Todays L3 switches typically have an ND/ARP table size limitations in the > 1-4k entry range. > >> What if SLAAC was limited to using 20 bits or even just 16 bits of MAC BIA >> information or even in extremis dare I say 12 bits? > > /120 would be more doable. When I think of ND table size per customer, I'm > thinking limitation to 16-32 entries, after that the customer needs to get a > router.
We have seen problems in the 2^11 or 2^12 in IPv4 land with directly-connected customer lans. The ability for the Mac <-> IP (ARP) to work properly is a serious issue with reasonable routers. I think the larger issue here is that an ARP either solicited/unsolicited does not cause an entry to age. That is what happens in IPv6 (NDP) land, so that's an issue IMHO. - Jared -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
