Managing CMM Directory Content Managing Redundancy in a Stack and CMM
OmniSwitch 6250/6450 Switch Management Guide May 2012 page 5-27
Synchronizing the Primary and Secondary CMMs
If you have a secondary CMM in your switch, it is necessary to synchronize the software between the
primary and secondary CMMs. If the primary CMM goes down (for example, during a reboot), then the
switch fails over to the secondary CMM. If the software in the secondary CMM is not synchronized with
the software in the primary CMM, the switch does not function as configured by the administrator.
The synchronization process is shown in the following diagram :
In the above diagram:
1 The primary CMM copies its certified directory to the secondary CMM working directory (remember
that you cannot copy files directly to the certified directory, they must first be copied to the working
directory).
2 An automatic reboot is then triggered on the secondary CMM, loading the new contents of the
working directory to the running configuration.
3 If no problems exist, then the working directory is automatically copied to the certified directory of the
secondary CMM.
If the secondary CMM fails to boot properly, then the contents of the secondary CMM’s certified direc-
tory overwrite the new software on the working directory of the secondary CMM. This causes denying the
attempted synchronization process.
This process copies the files in the certified directory of the primary CMM to the certified directory of the
secondary CMM. This prevents the secondary CMM from rebooting using incorrect or out-of-date soft-
ware if the primary CMM goes down.
This command synchronizes all switches in a stack.
Working
Certified
Running
Secondary CMM
Working
Certified
Primary CMM
1
3
2
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