User guide

Managing CMM Directory Content Managing CMM Redundancy
OmniSwitch AOS Release 7 Switch Management Guide March 2015 page 4-19
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. It’s normal for the NIs to
indicate a DOWN status for approximately 10 seconds while establishing communication to the second-
ary CMM, however this does not affect the flow of traffic.
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could result in the switch running old or out-of-date software.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 4-18.
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 AOS Release 7 CLI Reference Guide.
Note. The saved boot.cfg file will be overwritten if the takeover command is executed after the
copy flash-synchro command on a switch set up with redundant CMMs.