OPNsense 22.1.2-amd64
all intel nics on an atom board. radvd is running. It's been an issue with any BSD based firewall...i am on Comcast business using a /55 prefix. I have an ipv6 address on the wan..for some reason, it is not pulling the subnets on the internal subnets.
PG SLOT (https://webpressive.com/pg-slot-2/)
Ca you try Comcast config I mentioned in Reply #2 here?
https://forum.opnsense.org/index.php?topic=27283.msg132424#msg132424