What does the area ID of the FC address identify?

Question

Options

• AGroup of ports within a switch
• BAn individual port within a fabric
• CLocation of the name server within the fabric
• DUnique number provided to each switch in the fabric

• A
  84% (42)
• B
  8% (4)
• C
  6% (3)
• D
  2% (1)

Explanation

FC Addressing in Switched Fabric An FC address is dynamically assigned when a node port logs on to the fabric. The FC address has a distinct format, as shown in the slide. The first field of the FC address contains the domain ID of the switch. A Domain ID is a unique number provided to each switch in the fabric. Although this is an 8-bit field, there are only 239 available addresses for domain ID because some addresses are deemed special and reserved for fabric management services. For example, FFFFFC is reserved for the name server, and FFFFFE is reserved for the fabric login service. The area ID is used to identify a group of switch ports used for connecting nodes. An example of a group of ports with common area ID is a port card on the switch. The last field, the port ID, identifies the port within the group. Therefore, the maximum possible number of node ports in a switched fabric is calculated as: 239 domains X 256 areas X 256 ports = 15,663,104

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