Cfs Merge Support; Displaying Cfs Configuration Information - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Chapter 13 Using the CFS Infrastructure
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Figure 13-1
Exercise caution when using this function to clear locks in the fabric. Any pending configurations in any
Caution
switch in the fabric is flushed and lost.

CFS Merge Support

An application keeps the configuration synchronized in a fabric through CFS. Two such fabrics might
merge as a result of an ISL coming up between them. These two fabrics could have two different sets of
configuration information that need to be reconciled in the event of a merge. CFS provides notification
each time an application peer comes online. If a fabric with M application peers merges with another
fabric with N application peers and if an application triggers a merge action on every such notification,
a link-up event results in M*N merges in the fabric.
CFS supports a protocol that reduces the number of merges required to one by handling the complexity
of the merge at the CFS layer. This protocol runs per application per scope. The protocol involves
selecting one switch in a fabric as the merge manager for that fabric. The other switches do not play any
role in the merge process.
During a merge, the merge manager in the two fabrics exchange their configuration databases with each
other. The application on one of them merges the information, decides if the merge is successful, and
informs all switches in the combined fabric of the status of the merge.
In case of a successful merge, the merged database is distributed to all switches in the combined fabric
and the entire new fabric remains in a consistent state. You can recover from a merge failure by starting
a distribution from any of the switches in the new fabric. This distribution restores all peers in the fabric
to the same configuration database.

Displaying CFS Configuration Information

To display the status of CFS distribution on the switch using Device Manager, follow these steps:
Step 1 Choose Admin > CFS (Cisco Fabric Services).
You see the CFS dialog box. This dialog box displays the distribution status of each feature using CFS,
which currently registered applications are using CFS, and the result of the last successful merge
attempt.
Select a row and click Details to view more information about the feature.
Step 2
OL-17256-03, Cisco MDS NX-OS Release 4.x
Clearing Locks
Cisco MDS 9000 Family Fabric Manager Configuration Guide
CFS Merge Support
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