User guide

Managing CMM Directory Content Managing Redundant CMMs
OmniSwitch 7700/7800/8800 Switch Management Guide April 2006 page 4-19
Managing Redundant CMMs
The following section describe circumstances that the user should be aware of when managing the CMM
directory structure on a switch with redundant CMMs. It also includes descriptions of CLI commands
designed to synchronize software between the primary and secondary CMMs.
Rebooting the Switch
You can specify a reboot of the secondary CMM by using the secondary keyword in conjunction with the
reload command. For example, to reboot the secondary CMM, enter the reload command as shown:
-> reload secondary
In this case, the current primary CMM continues to run, while the secondary CMM reboots.
Scheduling a Reboot
It is possible to cause a reboot of the primary or secondary CMM at a future time by setting time parame-
ters in conjuction with the reload command.
For example, to schedule a reboot of the secondary CMM in 8 hours and 15 minutes on the same day,
enter the following at the prompt:
-> reload secondary in 08:15
Note. Scheduled reboot times should be entered in military format (i.e., a twenty-four hour clock).
Canceling a Scheduled Reboot
To cancel a scheduled reboot, use the cancel keyword. A cancel command can be specified for a primary
reboot, a secondary reboot, or all currently scheduled reboots. For example, to cancel the primary reboot
set above, enter the following:
-> reload secondary cancel
Secondary CMM Fail Over
When rebooting the switch during normal operation, and a secondary CMM is installed, the switch will
“fail over” to the secondary CMM. “Fail over” means the secondary CMM takes the place of the primary
CMM. This prevents the switch from ceasing functionality during the boot process. If the versions of the
software on the primary and secondary CMM are not synchronized, the NI modules on the switch will
restart, causing severe packet loss.
Synchronizing the primary and secondary CMMs is done using the copy flash-synchro command
described in “Synchronizing the Primary and Secondary CMMs” on page 4-21.
Note. If a switch fails over to the secondary CMM, it is necessary to have a management interface connec-
tion to the secondary CMM (such as an Ethernet port or a console port).