text: **8.3.3 Enabling NPIV on an existing system**
  
  When IBM Spectrum Virtualize systems that are running code earlier than V7.7.1 are 
  upgraded to V7.7.1 or later, the NPIV feature is not turned on by default because it might 
  require changes to host-side zoning. 
  
  Enabling NPIV on a system requires that you complete the following steps after you meet the 
  prerequisites: 
  
  1. Audit your SAN fabric layout and zoning rules because NPIV has stricter requirements. 
  Ensure that equivalent ports are on the same fabric and in the same zone. 
  
  2. Check the path count between your hosts and the IBM Spectrum Virtualize system to 
  ensure that the number of paths is half of the usual supported maximum. 
  
  For more information, see IBM Knowledge Center. 
  
  3. Run the**lstargetportfc**command to discover the primary host attach WWPNs (virtual 
  WWPNs), as shown in**bold**in Example 8-5. 