Fibre Channel Addressing - WWNs

WWN (Worldwide Name) is a unique 64-bit value that is assigned to a device at the factory.

Each N_Port and NL_Port (HBA port or Starage Disk) has one nWWN and one or more pWWNs (port WWN):

canterbury# sho flogi database
---------------------------------------------------------------------------
INTERFACE  VSAN    FCID            PORT NAME               NODE NAME
---------------------------------------------------------------------------
fc1/5       1     0xef0000  50:0a:09:81:99:9b:48:e0  50:0a:09:80:89:9b:48:e0     [Netapp]
fc1/12     1     0xef0003  50:05:07:63:0e:00:08:f3  50:05:07:63:0e:fe:08:f3        [Panda]
fc1/16     1     0xef0004  10:00:00:00:c9:32:27:85  20:00:00:00:c9:32:27:85

Total number of flogi = 3.

Each F_Port (physical port on the switch) has one fWWWN (fabric WWN)

mds9506# show interface fc 1/1

fc1/1 is down (SFP not present)

    Hardware is Fibre Channel

    Port WWN is 20:01:00:05:30:00:9b:9d

Each Fabric Switch has one sWWN (switch WWN)

mds9506# show wwn switch

Switch WWN is 20:00:00:05:30:00:9b:9d

Each VSAN has its own VSAN sWWN.

mds9506# show fcdomain vsan 1

The local switch is the Principal Switch.

Local switch run time information:

        State: Stable

        Local switch WWN:    20:01:00:05:30:00:9b:9e

        Running fabric name: 20:01:00:05:30:00:9b:9e