Information About Fibre Channel Domains

The Fibre Channel domain (fcdomain) feature performs principal switch selection, domain ID distribution, FC ID allocation, and fabric reconfiguration functions as described in the FC-SW-2 standards. The domains are configured on a per VSAN basis. If you do not configure a domain ID, the local switch uses a random ID.

This section describes each fcdomain phase:

• Principal switch selection—This phase guarantees the selection of a unique principal switch across the fabric.
• Domain ID distribution—This phase guarantees each switch in the fabric obtains a unique domain ID.
• FC ID allocation—This phase guarantees a unique FC ID assignment to each device attached to the corresponding switch in the fabric.
• Fabric reconfiguration—This phase guarantees a resynchronization of all switches in the fabric to ensure they simultaneously restart a new principal switch selection phase.

Caution

Changes to fcdomain parameters should not be performed on a daily basis. These changes should be made by an administrator or individual who is completely familiar with switch operations.

This section includes the following topics:

• Domain Restart
• Domain Manager Fast Restart
• Switch Priority
• fcdomain Initiation
• Incoming RCFs
• Autoreconfiguring Merged Fabrics
• Domain IDs
• Locking the Fabric
• Committing Changes
• Clearing a Fabric Lock
• FC IDs

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