What LIFs are
A LIF (logical interface) is an IP address or WWPN with associated characteristics, such as a service policy, a home port, a home node, a list of ports to fail over to, and a firewall policy. You can configure LIFs on ports over which the cluster sends and receives communications over the network.
LIFs can be hosted on the following ports:
Physical ports that are not part of interface groups
Physical ports or interface groups that host VLANs
Virtual IP (VIP) ports
VIP LIFs are supported and are hosted on VIP ports.
While configuring SAN protocols such as FC on a LIF, it will be associated with a WWPN.
The following figure illustrates the port hierarchy in an ONTAP system: