Currently we are in the process of planning our IPv6 addressing schema for our network. We are a service provider with around 20 core routers, and several hundred enterprise customers. These customers currently connect back to our core via a separate VLANs or channelized DS1/DS3/OC-X type interfaces. Thus currently lots of /30 IPv4 blocks. Our address allocation is 2001:1940::/32 Here is our current plan, but we are looking for suggestions from people who have been down this road before. The plan is to break out a /48 for our organization. Then break out the first /64 for loopbacks, and the next /64 for point-to-point connections. The PTP /64 then breaks out further into 1 /80 for core links, and 1 /80 for each of our distribution sites. Within these /80's are individual /112's for PTP links. What this will allow us to do is aggregate each sites PTP connections into /80's within our IGP. Looks something like this. 2001:1940::/48 - TransAria 2001:1940::/64 - Loopbacks/NMS/ETC 2001:1940::1/128 - Router 1 2001:1940::2/128 - Router 2 2001:1940:0:1::/64 - PTP Links 2001:1940:1::/80 - Core Links (non-aggergratable) 2001:1940:0:1::/112 - Core Link 1 2001:1940:0:1::1 - Router A 2001:1940:0:1::2 - Router B 2001:1940:0:1::1:1/112 - Core Link 2 2001:1940:0:1::1:1 - Router A 2001:1940:0:1::1:2 - Router B 2001:1940:0:1:1::/80 - Distribution Site 1 2001:1940:0:1:1::/112 - Customer Link 1 2001:1940:0:1:1::1 - Dist Router 2001:1940:0:1:1::2 - Customer Equipment 2001:1940:0:1:1:0:1:0/112 - Customer Link 2 2001:1940:0:1:1:0:1:1 - Dist Router 2001:1940:0:1:1:0:1:2 - Customer Equipment 2001:1940:0:1:2::/80 - Distribution Site 2 2001:1940:0:1:2:::/112 - Customer Link 1 2001:1940:0:1:2::1 - Dist Router 2001:1940:0:1:2::2 - Customer Equipment 2001:1940:0:1:2:0:1:0/112 2001:1940:0:1:2:0:1:1 - Dist Router 2001:1940:0:1:2:0:1:1 - Customer Equipment 2001:1940:1::/48 - Customer 1 Assignment 2001:1940:2::/48 - Customer 2 Assignment 2001:1940:3::/48 - Customer 3 Assignment Thoughts? Thanks! Cody