On Jul 17, 2011, at 4:54 AM, Sander Steffann wrote: > Hi, > >> I think the same applies to hosts with lots of VMs: maintaining a potentially >> large number of NC entries for a single MAC address is unlikely to scale. >> This is what routing is designed for. > > Then why are there 64 bits in the IID? And I don't think it has anything to > do with the MAC address. 1000 IPv6 addresses on 10 MAC addresses scales as > well as 1000 IPv6 addresses on 1000 MAC addresses. It might make a difference > for the switch, but not for ND/NC.
ieee eui-64 uses 64 bits therefore some interface types (firewire ports for example) have 64 bit mac address. we will eventually run out of 48 bit mac addresses given there are only 16.7 million oui blocks... > - Sander > PS: I consider having the possibility of having a large amount of IPv6 > addresses on one interface a great feature, not something I would want to > limit. > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
