Option 82 configuration example

Network requirements

As shown in Figure 25, the DHCP relay agent (Switch A) replaces Option 82 in DHCP requests before forwarding them to the DHCP server (Switch B).

To use Option 82, you must also enable the DHCP server to handle Option 82.

Configuration procedure

# Specify IP addresses for the interfaces. (Details not shown.)

# Enable DHCP.

<SwitchA> system-view
[SwitchA] dhcp enable

# Enable the DHCP relay agent on VLAN-interface 10.

[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] dhcp select relay

# Specify the IP address of the DHCP server.

[SwitchA-Vlan-interface10] dhcp relay server-address 10.1.1.1

# Configure the handling strategies and padding content of Option 82.

[SwitchA-Vlan-interface10] dhcp relay information enable
[SwitchA-Vlan-interface10] dhcp relay information strategy replace
[SwitchA-Vlan-interface10] dhcp relay information circuit-id string company001
[SwitchA-Vlan-interface10] dhcp relay information remote-id string device001