MDS Fabric Switch assigns a VSAN-wide unique FCID to each device (HBA Port or Disk Drive) during the FLOGI. Other vendor switches assign a banric-wide unique FCID to each device.
The 24-bit FCID consists of three 8-bit fields:
1st byte - Domain ID of a switch the device is connected to.
2nd byte - Area ID - for each N_Port and NL_Port, the switch will assign area field started at 0x00 and incrementing by one for each consecutive ogin
3rd byte - Device ID
Well-known FCID addresses:
The 24-bit FCID consists of three 8-bit fields:
1st byte - Domain ID of a switch the device is connected to.
2nd byte - Area ID - for each N_Port and NL_Port, the switch will assign area field started at 0x00 and incrementing by one for each consecutive ogin
3rd byte - Device ID
Well-known FCID addresses:
- 0xFFFFFA - Management Server
- 0xFFFFFB - Time Server
- 0xFFFFFC - Name Server/Directory Server (show fcns database)
- 0xFFFFFD - Fabric Controller (Used for communication between switches)
- 0xFFFFFE - Fabric F_Port (Used by N_Ports for Fabric Login)
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