4000 Router Series Layer 3 - IP Services Command Reference

Default

The DHCP relay agent does not support Option 82.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

This command enables the DHCP relay agent to add Option 82 to DHCP requests that do not contain

Option 82 before forwarding the requests to the DHCP server. The content of Option 82 is determined

by the dhcp relay information circuit-id and dhcp relay information remote-id commands. If the DHCP

requests contain Option 82, the relay agent handles the requests according to the strategy configured

with the dhcp relay information strategy command.

If this feature is disabled, the relay agent forwards requests that contain or do not contain Option 82 to

the DHCP server.

Examples

# Enable Option 82 support on the relay agent.

<Sysname> system-view

[Sysname] interface ethernet 1/1

[Sysname-Ethernet1/1] dhcp relay information enable

Related commands

• dhcp relay information circuit-id

• dhcp relay information remote-id

• dhcp relay information strategy

• display dhcp relay information

dhcp relay information remote-id

Use dhcp relay information remote-id to configure the padding content and padding format for the

remote ID sub-option of Option 82.

Use undo dhcp relay information remote-id to restore the default.

Syntax

dhcp relay information remote-id { normal [ format { ascii | hex } ] | string remote-id | sysname }

undo dhcp relay information remote-id

Default

The content mode is normal and the padding format is hex.

Views

Interface view

Predefined user roles

network-admin