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page 4-26 OmniSwitch 6600 Family Switch Management Guide March 2005
Synchronizing the Primary and Secondary CMMs
If you have a secondary CMM in your switch, it will be necessary to synchronize the software between the
primary and secondary CMM. 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 will not function as configured by the administrator.
The synchronization process is shown in the diagram below:
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 direc-
tory).
2 A reboot of the secondary CMM must be initiated (either immediately or at a later time), 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.
This process continues down the line until all switches in the stack are synchronized.
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 has the effect of
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 This prevents the secondary CMM from rebooting using incorrect or out-of-date soft-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 should the primary CMM go down.
On a stack, this command will synchronize all switches in the stack.
Working
Certified
Running
Secondary CMM
Working
Certified
Primary CMM
1
3
2