IPv6 Address Planning

Tue Aug 9 17:24:22 UTC 2005

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