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Using a Textual Description in Option 82

By default, when DHCP option 82 is inserted into client packets, the Agent Circuit ID suboption includes the interface identifier. You can optionally configure that the Agent Circuit ID suboption include the textual description that is configured for the interface instead of the interface identifier. You can use the textual description for either the logical interface or the device interface.

You can include the textual interface description in the Agent Circuit ID suboption for static interfaces. The textual description is configured using the description statement at the [edit interfaces interface-name] hierarchy level. If you specify that the textual description is used and no description is configured for the interface, DHCP relay defaults to using the interface identifier.

To configure the DHCP relay option 82 suboption to include the textual interface description:

  1. Specify that you want to configure option 82 support.
    [edit forwarding-options dhcp-relay]user@host# edit relay-option-82
  2. Specify insertion of the Agent Circuit ID information.
    [edit forwarding-options dhcp-relay relay-option-82]user@host# edit circuit-id
  3. Specify that the textual description is included in the option 82 information. In this example, the option 82 information includes the description used for the device interface.
    [edit forwarding-options dhcp-relay relay-option-82 circuit-id]user@host# set use-interface-description device

Published: 2010-04-15

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