My ISP began randomly (well, sort of by request, but without telling me that they were doing it) assigning me an IPv6 /60 prefix via DHCPv6. My DHCPv6 request does not include a request for a prefix, but the reply contains one. I now want to split this up into various /64 subnets on my various VLANs. I would like this to continue to work even if my ISP changes the prefix.
What’s the way to do this that will fit the best with Turis’ auto-update strategy so that an update is highly unlikely to bork my setup?
One other interesting datapoint, I’m also getting IPv6 router advertisement packets with an unrelated (well, still within my ISP’s IPv6 range) /64 prefix in it.
Additionally, it would be nice if some hosts on some subnets could have stable IPv6 addresses and a DNS entry, as well as being able to be mostly open to the world from a firewall perspective. How would I accomplish this?
Right now, the whole /60 seems to be being used to hand out IPv6 addresses on one VLAN.