IPoEv4 considerations

Unnumbered subscriber hosts are instantiated on a subscriber interface that is configured to be unnumbered or to allow unmatching subnets. The IPv4 address of an unnumbered host falls outside the subnets configured on the subscriber interface.

By default, Subscriber Host Connectivity Verification (SHCV) ARP requests for unnumbered hosts are sent with an all-zeros (0.0.0.0) source IP address (also known as the sender IP address). The source IP address can be changed to any unicast IPv4 address in the SHCV policy:

configure subscriber-mgmt
        shcv-policy "shcv-policy-1" create
            layer-3
                unnumbered-source-ip 192.0.2.1
            exit
        exit