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circuit-id

Syntax

circuit-id {prefix hostname;use-interface-description;use-vlan-id;}

Hierarchy Level

[edit ethernet-switching-options secure-access-port vlan (all | vlan-name) dhcp-option82][edit forwarding-options helpers bootp dhcp-option82] [edit forwarding-options helpers bootp interface interface-name dhcp-option82]

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.

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 (interface and/or VLAN) on which the DHCP request arrived.

The format of the circuit-id information for Gigabit Ethernet interfaces that use VLANs is interface-name:vlan-name . On a Layer 3 interface, the format is just interface-name.

The remaining statements are explained separately.

Default

If DCHP 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 .

Required Privilege Level

system—To view this statement in the configuration.

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