The hosts alice and carol set up a tunnel connection each to gateway moon. Both hosts request a virtual IP via the IKEv1 Mode Config payload by using the leftsourceip=%config parameter. Gateway moon assigns virtual IP addresses from a simple pool defined by rightsourceip=10.3.0.0/28 to hosts connecting to the eth0 (PH_IP_MOON) interface and virtual IP addresses from a simple pool defined by rightsourceip=10.4.0.0/28 to hosts connecting to the eth1 (PH_IP_MOON1) interface.

Thus carol is assigned PH_IP_CAROL1 whereas alice gets 10.4.0.1 and both ping the gateway moon.