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page 4-28 OmniSwitch 6600 Family Switch Management Guide March 2005
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” 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could result in the switch running old or out-of-date software.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 4-26.
To instruct the secondary CMM to takeover switch functions from the primary CMM, enter the following
command at the prompt:
->takeover
The takeover command is described in detail in the OmniSwitch CLI Reference Guide.
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 “Managing Stacks” in the OmniSwitch 6600 Family Hardware Users Guide.
Note. The saved boot.cfg file will be overwritten if the takeover command is executed after the copy
running-config working or write memory commands, in an OmniSwitch set up with redundant CMMs.
Show Currently Used Configuration
In a chassis with a redundant CMM, the display for the currently running configuration tells the user if the
primary and secondary CMM is synchronized.
To check the directory from where the switch is currently running and if the primary and secondary CMM
are synchronized, enter the following command:
-> show running-directory
CONFIGURATION STATUS
Running CMM : PRIMARY,
CMM Mode : DUAL CMMs,
Current CMM Slot : 1,
Running configuration : WORKING,
Certify/Restore Status : CERTIFY NEEDED
SYNCHRONIZATION STATUS
Flash Between CMMs : SYNCHRONIZED,
Running Configuration : NOT AVAILABLE,
Stacks Reload on Takeover: ALL STACKs (SW Activation)