Hello. FreeRADIUS Version 2.1.10 (from git sources). I'm using dhcp feature of freeradius to assign static ips to computers dynamically. Sometimes its needed to reply to dhcp packets with same opt82 as in request. For example, cisco uses opt82 from replied packet to know from which port request has arrived (IP source guard, "ip verify source port-security" interface command). For this scenario, I added following to dhcp update sections: DHCP-Agent-Circuit-Id := "%{request:DHCP-Agent-Circuit-Id}" DHCP-Agent-Remote-Id := "%{request:DHCP-Agent-Remote-Id}" In this case, radius debug output shows correct assignment of options: Sending DHCP-Offer of id 7c0f40cd from 0.0.0.0:67 to x.x.x.1:67 DHCP-Subnet-Mask = 255.255.255.0 DHCP-Router-Address = x.x.x.1 DHCP-Domain-Name-Server = y.y.y.y DHCP-IP-Address-Lease-Time = 86400 DHCP-DHCP-Server-Identifier = z.z.z.z DHCP-Agent-Circuit-Id = 0x000401e30420 DHCP-Agent-Remote-Id = 0x000600FFFFFFFF00 Finished request 10. but both this two values (0x000401e30420 and 0x000600FFFFFFFF00) are assigned to DHCP-Relay-Agent-Information. tcpdump shows both as opt82 suboption 0: 5206000401e30420 5208000600FFFFFFFF00 Need help in setting this options correctly.