The set protocols dhcp snooping option82 circuit-id command configures the format of sub-option circuit ID inserted into the Option 82 field for DHCP snooping.

NOTE: The sub-option circuit ID is applied to VLANs where option82-policy is set to “insert” or “replace”.

Command Syntax

set protocols dhcp snooping option82 circuit-id <port-index | port-name | port-description>

Parameters

Parameter

Description

circuit-id <port-index | port-name | port-description>

Specifies the type of circuit ID in the Option 82 field. The value could be port-index, port-name or port-description.

By default, the sub-option circuit ID is not configured which means circuit ID is not enabled.

Usage Guidelines

If configured, the circuit ID is filled with the port identifier and VLAN.

When “port-index” is selected, the format of the circuit ID is “VLAN ID + port index”.
When “port-name” is selected, the format of the circuit ID is “VLAN ID + port name”.
When “port-description” is selected, the format of the circuit ID is “VLAN ID + port description”. The value of “port-description” can be set by the following commands:

set interface aggregate-ethernet <lag_name> description <description>

set interface gigabit-ethernet <physical-port> description <description>

Note that, when configuring Option 82 in MLAG environment, remote ID should be set to “system-mac” and circuit ID should be set to “port-index”.

Example

Configure the format of the sub-option circuit ID for the Option 82 field.

admin@Xorplus# set protocols dhcp snooping option82 circuit-id port-index