Configuration guidelines
To support Option 82, perform related configuration on both the DHCP server and relay agent. See "Configuring DHCP server" for DHCP server configuration of this kind.
If the handling strategy of the DHCP relay agent is configured as replace, you must configure a padding format for Option 82. If the handling strategy is keep or drop, you need not configure any padding format.
If sub-option 1 (node identifier) of Option 82 is padded with the device name (sysname) of a node, the device name must contain no spaces. Otherwise, the DHCP relay agent will drop the message.