Overriding Option 82 Information

You can configure the DHCP relay agent to add or remove the DHCP relay agent information option (option 82) in DHCP packets.

To override the default option 82 information in DHCP packets destined for a DHCP server, include the always-write-option-82 statement. The use of this statement causes the DHCP relay agent to perform one of the following actions, depending on how it is configured:

• If the DHCP relay agent is configured to add option 82 information to DHCP packets, it clears the existing option 82 values from the DHCP packets and inserts the new values before forwarding the packets to the DHCP server.
• If the DHCP relay agent is not configured to add option 82 information to DHCP packets, it clears the existing option 82 values from the packets, but does not add any new values before forwarding the packets to the DHCP server.

Note: Option 82 is not supported on MX-series routers.

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