text: **4.6.1 Planning for local port masking**
  
  The system has two Fibre Channel port masks. The local port mask controls connectivity to 
  other nodes in the same system, and the partner port mask control connectivity to nodes in 
  remote, partnered systems. By default, all ports are enabled for both local and partner 
  connectivity. 
  
  The port masks apply to all nodes on a system. It is not possible to have different port mask 
  on different nodes of the same cluster. However, you do not have to have the same port mask 
  on partnered systems. 
  
  **Note:**The use of the**lsfabric**command shows all of the paths that are possible in IBM 
  Spectrum Virtualize (as defined by zoning) independent of their usage. Therefore, the 
  command output includes paths that are used because of port masking. 
  
  A port mask is a string of zeros and ones. The last digit in the string represents port one. The 
  previous digits represent ports two, three, and so on. If the digit for a port is set to “1”, the port 
  is enabled for the specific type of communication, and the system attempts to send and 
  receive traffic on that port. If it is “0”, the system does not send or receive traffic on the port. If 
  not enough digits are in the configuration string to set a value for the specific port, that port is 
  disabled for traffic. 