"Quote from: YordiDR on March 06, 2026, 01:52:55 PMI've got the same issue.
I'm running ISC DHCP on separate containers. This is working fine with DHCrelay on IPv4.
On IPv6, the DHCP servers are failing to assign addresses because they cannot map the incoming relayed DHCP request to a DHCP pool.
I also saw the OPNsense DHCrelay set the link-address to it's link-local address. If it would send it's GUA address instead, the DHCP server could map it to the correct GUA pool.
I got the same problem as you described. For reasons I am running a Kea DHCP server in a different subnet as the clients are on a different machine so I relay the traffic via opnsense's dhcp relay. The problem is that it uses the link-local address instead of the global ipv6 as source to forward the relay's and Kea won't be able to properly select a subnet. I do use correct class selection in Kea for subnet selection but it doesn't come to that stage yet.
