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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:

Release Information

Statement introduced in Junos OS Release 9.3 for EX Series switches.

Statement introduced in Junos OS Release 11.3 for the QFX Series.

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.)

Statement introduced in Junos OS Release 14.1 for the MX Series.

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-nameAdd router host name to DHCP option 82 circuit ID.
logical-system-nameAdd 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-nameAdd 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.