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Figure 5-36 shows the three WWPNs that are associated with a SAN Volume Controller port when NPIV is enabled. 

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The failover host attach port (shown in pink in Figure 5-36) is not active at this time. Figure 5-37 on page 248 shows what occurs when the second node fails. Subsequent to the node failure, the failover host attach ports on the remaining node are active and take on the WWPN of the failed node’s primary host attach port. 

Note:  Figure 5-37 on page 248 shows only two ports per node in detail, but the same applies for all physical ports. 

