In the case of a node-pend event, the iSCSI IP addresses assigned to node Ethernet ports fail over to the partner node. While the IP addresses are in a failover state, discovery cannot be initiated from the node those addresses are assigned to, even though the node ports show as configured. Discovery can be initiated when the IP addresses fail back. The IP addresses fail back immediately if the node unpends 5 minutes or more after the pend event. If the node unpends less than 5 minutes after the pend event, the IP addresses fail back only after pend time + 5 minutes.
Use the management GUI or the lsportip command to verify that the IP addresses failed back to the owning node before retrying discovery.