Is the DHCP relay’s option 82 configured correctly?
If DHCP Relay option 82 profile is used, check the circuit-ID in the DHCP server. For
example, option profile default 1(Slot-port, VLAN), the relay agent adds option 82
circuit-id in DHCP packets and forward this to the DHCP Server, then the DHCP
server received the packet, it will check the option 82 and assign IP address.
Figure 19 DHCP Smart Relay Option 82
Figure 20 Per-VLAN Relay Option 82
For Windows OS, check the IP Pool policy. Below is a configuration example;
0002000a, “00” stands for slot-id, “02 stands for port number on relay agent and
“000a” is the VLAN ID.
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