The WWN of a host bus adapter is displayed in red on the WWN tab.

The HBA for the WWN that is displayed in red is connected to two or more ports, but the traffic between the HBA and some of the ports is not monitored by Performance Monitor. When many-to-many connections are established between HBAs and ports, make sure that all traffic between HBAs and ports is monitored. For details, see Monitoring all port-HBA traffic: many-to-many connections.