On 7/17/2017 11:09 PM, David Higgs wrote: >[snip] > After a good amount of trial and error, it appears that Comcast will only > dole out a single /128 via DHCPv6. Annoying but easy enough to work around > with pf(4) nat-to and some static RFC 4193 prefixes.
I have Comcast as my ISP. Comcast's IPv6 DHCP, by default, doles out a /128. If you also want a prefix delegation, you have to ask for it. Comcast will give out up to a /60 prefix delegation. I ask for and receive a /62. If you don't specify a prefix delegation length, you'll get a /64 prefix. I use the ISC-DHCP dhclient with this patch: https://archive.mgm51.com/sources/pd-pref.html It's been running reliably ever since Comcast fired up IPv6 in my area, i.e., more than three years. IPv6 is deployed nationwide on Comcast's network for at least a couple of years now.
