Managing CMM Directory Content Managing Redundancy in a Stack and CMM
OmniSwitch AOS Release 6 Switch Management Guide July 2010 page 5-29
Swapping the Primary CMM for the Secondary CMM
If the primary CMM is having problems, or if it needs to be shut down, then the secondary CMM can be
instructed to “take over” the switch operation as the primary CMM is shut down.
Note. It is important that the software for the secondary CMM has been synchronized with the primary
CMM before you initiate a secondary CMM takeover. If the CMMs are not synchronized, the takeover
could result in the switch running old or out-of-date software. Synchronizing the primary and secondary
CMMs is described in “Synchronizing the Primary and Secondary CMMs” on page 5-27.
To instruct the secondary CMM to takeover switch functions from the primary CMM, enter the following
command at the prompt:
-> takeover
To instruct the secondary CMM to takeover switch functions from the primary CMM with a complete
CMM reload, enter the following command at the prompt:
-> takeover with-fabric
The takeover command is described in detail in the OmniSwitch CLI Reference Guide.
On OmniSwitch Stackable Series switches only, in a stack with three or more switches, the secondary
CMM takes over as primary and the original primary becomes “idle.” The next available idle switch
becomes the new secondary CMM. For more information on stacks, see the “Managing Stacks” chapter
found in the appropriate Hardware Users Guide.
Note. The saved boot.cfg file will be overwritten if the takeover command is executed after the
write memory command on a switch set up with redundant CMMs.
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