DHCP multiple IP helper-addresses

It is possible to configure multiple DHCP relay agents on a single interface using the ip helper-address command like so:

interface GigabitEthernet0/1 ip address ip helper-address ip helper-address

In such a case, DHCPDISCOVER messages are sent to all the helper addresses configured on the interface. The client will obtain IP addressing information from whichever DHCP server responds first. It's a similar situation to having two DHCP servers on the same subnet. It's not ideal, as this can increase DHCP traffic on a network, but it is doable.



Links to this page: