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prefix (DHCP Relay Agent)


Hierarchy Level


Add a prefix to the DHCP base option 82 Agent Circuit ID (suboption 1) or Agent Remote ID (suboption 2) information, or to the DHCPv6 option 18 (Relay Agent Interface-ID) or option 37 (Relay Agent Remote-ID) information in DHCP packets that DHCP relay agent sends to a DHCP server. The prefix can consist of any combination of the hostname, logical system name, and routing instance name.


prefix—Any of the following:

  • host-name—Prepend the hostname of the router configured with the host-name statement at the [edit system] hierarchy level to the DHCP option information.

  • logical-system-name—Prepend the name of the logical system to the option information.

  • routing-instance-name—Prepend the name of the routing instance to the option information.

Required Privilege Level

interface—To view this statement in the configuration.

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

Release Information

Statement introduced in Junos OS Release 8.3.

Support at the [edit ... dhcpv6] hierarchy levels introduced in Junos OS Release 11.4.

Support at the [edit ... relay-agent-remote-id] and [edit ... remote-id] hierarchy levels introduced in Junos OS Release 14.1.