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prefix (Circuit ID for Option 82)

Syntax

Hierarchy Level

  • For platforms with enhanced Layer 2 software (ELS):

  • For platforms without ELS:

  • For MX Series platforms:

Description

Configure an optional prefix for the circuit ID suboption in the DHCP option 82 information that is inserted by the switch or router into the packet header of a DHCP request before it forwards or relays the request to a DHCP server.

Default

If the prefix statement is not explicitly specified, no prefix is prepended to the circuit ID.

Options

host-name

Add router host name to DHCP option 82 circuit ID.

logical-system-name

Add logical system name to DHCP option-82 circuit ID.

This option is not used for the prefix statement at any of the above hierarchy levels.

routing-instance-name

Add routing instance name to DHCP option-82 circuit ID.

This option is not used for the prefix statement occurring at the following hierarchy levels:

  • [edit bridge-domains bridge-domain-name forwarding-options dhcp-security option-82circuit-id]

  • Any of the hierarchy levels for the platforms without ELS

Required Privilege Level

system—To view this statement in the configuration.

system-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 9.3.

Hierarchy level [edit vlans vlan-name forwarding-options dhcp-security option-82 circuit-id] introduced in Junos OS Release 13.2X50-D10. (See Using the Enhanced Layer 2 Software CLI for information about ELS.)