Technical Documentation



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 Release 9.3 for EX Series switches.


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.


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

routing—To view this statement in the configuration.

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

Published: 2010-01-19