hpnicfFCoEStaticVfcBindIfIndex holds the ifIndex of the specific Ethernet interface used to bind a static VFC when the local FCF is directly connected to the associated ENode or remote-FCF over that interface, and is zero when there's no direct connection. Admins set this to bind the VFC to a known physical or logical Ethernet port rather than relying on MAC-address matching, which is useful for point-to-point or directly attached FCoE links. For example, an admin might set this to the ifIndex of a specific 10GbE port that directly connects to a known ENode, leaving hpnicfFCoEStaticVfcBindMACAddress unset.