Synchronizing The Primary And Secondary Cmms - Alcatel-Lucent OmniSwitch 6800 Series Management Manual

Managing CMM Directory Content

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 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 will not function as configured by the administrator.
The synchronization process is shown in the diagram below:
Working
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
An automatic reboot is then triggered on the secondary CMM, loading the new contents of the work-
ing directory to the running configuration in OmniSwitch 9000 switches only.
3 If no problems exist, then the working directory is automatically copied to the certified directory of the
secondary CMM.
On OmniSwitch 6800 and 6850 switches only, 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 This prevents the secondary CMM from rebooting using incorrect or out-of-date soft-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 a stack of OmniSwitch 6800 or OmniSwitch
6850 switches.
OmniSwitch 6800/6850/9000 Switch Management Guide
1
Certified
Primary CMM
Managing Redundancy in a Stack and CMM
Working
3
2
Running
December 2007
Certified
Secondary CMM
page 4-27