DHCP Smart Relay for Secondary IP Interfaces

With DHCP Smart Relay functionality, the relay agent inserts both the primary and secondary IP addresses of the client-facing interface (VLAN or VRRP) as the gateway IP address in the DHCP packet. The DHCP relay agent can use secondary IP addresses if there is no reply to the DHCPOFFER message on the server.

For more information about secondary IP addresses, see Secondary IP Interfaces.

DCHP Smart Relay functionality provides two modes:

For DHCP Smart Relay to use a subset of VRRP addresses, you must configure the agent IP in the forwarding path with a VRRP address and you must configure at least the following VRRP items on the VLAN:

Note

Note

These requirements are not specific to DHCP Smart Relay and also apply to DHCP Relay in general.

For configuration information, see the following sections: