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

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Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 7 Using Cisco Fabric Services
CFS Support for Applications
CFS has the following requirements:
• Implicit CFS usage—The first time you issue a CFS task for a CFS-enabled application, the
configuration modification process begins and the application locks the network.
• Pending database—The pending database is a temporary buffer to hold uncommitted information.
The uncommitted changes are not applied immediately to ensure that the database is synchronized
with the database in the other switches in the network. When you commit the changes, the pending
database overwrites the configuration database (also known as the active database or the effective
database).
• CFS distribution enabled or disabled on a per-application basis—The default (enable or disable) for
CFS distribution state differs between applications. If CFS distribution is disabled for an
application, then that application does not distribute any configuration nor does it accept a
distribution from other switches in the network.
• Explicit CFS commit—Most applications require an explicit commit operation to copy the changes
in the temporary buffer to the application database, to distribute the new database to the network,
and to release the network lock. The changes in the temporary buffer are not applied if you do not
perform the commit operation.
Enabling CFS for an Application
All CFS-based applications provide an option to enable or disable the distribution capabilities.
Applications have the distribution enabled by default.
The application configuration is not distributed by CFS unless distribution is explicitly enabled for that
application.
To enable CFS for a feature using Fabric Manager, perform this task:
Step 1 Choose a feature on which to enable CFS.
For example, expand Switches > Events and then choose CallHome in the Physical Attributes pane. The
Information pane shows that feature with a CFS tab. Click the CFS tab to display the CFS state for each
switch in the network for that feature.
Step 2 Decide on which switches to enable CFS. Set the Feature Admin column to either enable to enable CFS
or disable to disable CFS.
Note Enable CFS for all switches in the network or VSAN for the feature that uses CFS.
Step 3 Right-click the row you changed to see the pop-up menu. Choose Apply Changes to apply the CFS
configuration change. The CFS tab updates as the CFS changes take effect.
Fabric Manager retrieves the status of the CFS change and updates the Last Result column.