200-150 · Question #178
In fiber Channel networking, the FCID composed of which of the following?
The correct answer is C. domain ID, area ID, port ID. The Fibre Channel Identifier (FCID) is a 24-bit hierarchical address assigned to each port during fabric login, structured as three distinct 8-bit fields.
Question
In fiber Channel networking, the FCID composed of which of the following?
Options
- AVSAN ID, area ID, port ID
- Bdomain ID, zone ID, port ID
- Cdomain ID, area ID, port ID
- DVSAN ID, zone ID, port ID
How the community answered
(44 responses)- A2% (1)
- B2% (1)
- C91% (40)
- D5% (2)
Why each option
The Fibre Channel Identifier (FCID) is a 24-bit hierarchical address assigned to each port during fabric login, structured as three distinct 8-bit fields.
VSAN ID is a virtual SAN segmentation identifier and is not one of the three fields that make up the 24-bit FCID address.
Zone ID is an access control construct used for zoning membership and has no role in the FCID addressing hierarchy.
The FCID is composed of three 8-bit fields: the domain ID (identifying the specific switch within the fabric), the area ID (identifying a group of ports on that switch), and the port ID (identifying the individual port). This 24-bit address is assigned by the principal switch during FLOGI and provides a unique, routable identity for every port in the fabric. VSAN IDs and zone IDs are separate administrative constructs that do not form part of the FCID structure.
Neither VSAN ID nor zone ID are components of the FCID - only domain ID, area ID, and port ID form the three 8-bit segments.
Concept tested: Fibre Channel FCID address hierarchical structure
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/nx-os/configuration/guides/san/b_cisco_mds_nxos_san_config_guide.html
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