Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

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11-8
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 11 Configuring Domain Parameters
Domain IDs
Step 2 Click the Configuration tab and check the Auto Reconfigure check box for each switch in the fabric
that you want to automatically reconfigure.
Step 3 Click the Apply Changes icon to save these changes.
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.
This section describes how to configure domain IDs and includes the following topics:
• About Domain IDs, page 11-8
• Specifying Static or Preferred Domain IDs, page 11-10
• About Allowed Domain ID Lists, page 11-10
• Configuring Allowed Domain ID Lists, page 11-11
• About CFS Distribution of Allowed Domain ID Lists, page 11-12
• Enabling Distribution, page 11-12
• Locking the Fabric, page 11-12
• Committing Changes, page 11-12
• Discarding Changes, page 11-13
• Clearing a Fabric Lock, page 11-13
• Displaying Pending Changes, page 11-14
• Displaying Session Status, page 11-14
• About Contiguous Domain ID Assignments, page 11-14
• Enabling Contiguous Domain ID Assignments, page 11-15
About Domain IDs
The configured domain ID can be preferred or static. By default, the configured domain ID is 0 (zero)
and the configured type is preferred.
Note The 0 (zero) value can be configured only if you use the preferred option.
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 Figure 11-7):
1. The local switch sends a configured domain ID request to the principal switch.
2. The principal switch assigns the requested domain ID if available. Otherwise, it assigns another
available domain ID.