Domain Ids - Cisco Nexus 5000 Series Configuration Manual

Configuring Fibre Channel Domain Parameters

Domain IDs

Domain IDs uniquely identify a switch in a VSAN. A switch may have different domain IDs in different
VSANs. The domain ID is part of the overall FC ID.
The configured domain ID can be preferred or static. By default, the configured domain ID is 0 (zero) and
the configured type is preferred.
The 0 (zero) value can be configured only if you use the preferred option.
Note
If you do not configure a domain ID, the local switch sends a random ID in its request. We recommend that
you use static domain IDs.
When a subordinate switch requests a domain, the following process takes place (see the figure below):
• The local switch sends a configured domain ID request to the principal switch.
• The principal switch assigns the requested domain ID if available. Otherwise, it assigns another available
domain ID.
Figure 3: Configuration Process Using the Preferred Option
The operation of a subordinate switch changes based on three factors:
• The allowed domain ID lists
• The configured domain ID
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Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide, Release 5.2(1)N1(1)
Domain IDs
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