My team works with an allotment of IPv4 and IPv6 space, which is given to us from a larger organization in our company (we treat them like and ISP, where we request and are given IP space and allocate this across our buildings and sites as we deem appropriate), and have been given several /58's and /59's to make do with, which has been fine for years. Now we are looking at how to better allocate these resources, and I am curious if anyone has decided to carve up smaller than a /64?
My thoughts are, that while we currently use RA for IPv6 autodiscovery, and a /64 is the smallest network the RFC accounts for, I could chop a single /64 into several thousand /96's and uses these for PTP IPv6 routing only. This would save us a ton of IPv6 space, which as we deploy more and more Vlan interfaces and our network grows, I can see us running out of in the coming year(s), which would require asking for more IPv6 space, that we really don't need. Doing so would only be for PTP IPv6 routed links, and not use stateless autoconfig, and would allow us to re-IP current IPv6 PTP's using these /96 network and reclaim a large portion of our /64 space which was already deployed as PTP links.
Thoughts?
