Hi. I testing DHCPv6 (on ROS 6.34.6) with TP-Link router Archer C7 (with latest firmware 3.15). Basically everything work fine ... router got IPv6 prefix with DNS servers. But I cannot set this delegation static. After every reboot (or renew) tp-link got new prefix from pool.

I thing, mistake is in IAID value. Tplink sending (probably) random generated IAID... it is not static value (as of DUID is). Is there any solution in ROS? Ignoring this value, or define it as "any"?

Feature request: redistribute prefixes assigned from DHCPv6 to OSPF without setting "redistribute static". With this setting every OSPF router is in ASBR state ... it is not good in large networks.

possible to set static?

Yes. I need static prefix delegation. For example for servers behind router and theirs DNS records.