On Sun, Nov 18, 2012 at 7:53 PM, Jon Lewis <jle...@lewis.org> wrote: > It seems insane to try to setup a proper IPv6 subnet and unique gateway for > each VM, so I've been thinking something similar to what the host being > complained about here has done is the only way to go. Not down to the > detail of making the IPv6 ip based on the IPv4 IP, but giving out "very > small" v6 blocks, (i.e. maybe /120 or /124), out of a /48 with the > prefix::1/48 IP as everyone's gateway. Sure, IPv6 is big enough that we > could give out /64s from that /48 and not run out of numbers, but I'm > concerned about what happens when an abusive customer turns up 2^64 > addresses and overloads the neighbor discovery cache on our gear. What's > anyone really going to do with more than a few IP addresses on a VPS anyway? > Just as we do with additional v4 IPs, if someone really has a need for > additional v6 subnets, those could be provided, likely for a fee.
Hi Jon, Why not assign a single IPv6 address to each VM and then for those folks who need more, *route* a /64 to the original address? With Linux, I think you can then attach the whole /64 to a loopback alias (lo:1) and the host will understand that it has the entire /64 without creating neighbor table entries or any other chancy things. Regards, Bill Herrin -- William D. Herrin ................ her...@dirtside.com b...@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004