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Hierarchy Level


Configure DHCP relay server to use the configured loopback address as the source address in both the IP header and in DHCP messages relayed to the server.

In network configurations where a firewall on the broadband network gateway (BNG) is between the DHCP relay agent and the DHCP server, only the BNG loopback address passes through the BNG firewall. In that case, DHCP unicast packets do not pass through the firewall and are discarded. This configuration statement places the loopback address in IP headers and DHCP messages, which enables DHCP unicast packets to pass through the firewall to the DHCP server.



Specify the loopback interface. The interface-name must belo0.

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 16.1.