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I'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'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.
