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circuit-id

 

Syntax

Hierarchy Level

  • For platforms with Enhanced Layer 2 Software (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] 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.

Statement introduced in Junos OS Release 14.1X53-D20 for the OCX Series.

Description

Configure the circuit-id suboption (suboption 1) of DHCP option 82 (the DHCP relay agent information option) in DHCP packets destined for a DHCP server. This suboption identifies the circuit (the interface, the VLAN, or both) on which the DHCP request arrived.

The remaining statements are explained separately. See CLI Explorer.

Default

If DHCP option 82 is enabled on the switch, the circuit ID is supplied by default in the format interface-name:vlan-name or, on a Layer 3 interface, just interface-name.

Note

When you configure circuit-id, remote-id is also enabled, even if you do not explicitly configure remote-id .

Required Privilege Level

system—To view this statement in the configuration.

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

Related Documentation