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CMM Files
•
The RUNNING DIRECTORY is the directory that configuration changes will be saved to. Typically
the RUNNING DIRECTORY is the directory that the switch booted from, however, any directory can
be configured to be the RUNNING DIRECTORY.
•
The RUNNING CONFIGURATION is the current operating configuration of the switch obtained from
the directory the switch booted from in addition to any additional configuration changes made by the
user. The RUNNING CONFIGURATION resides in the switch's RAM.
Where is the Switch Running From?
When a switch boots the RUNNING CONFIGURATION will come from either the certified, working, or
a user-defined directory. A switch can be rebooted to run from any directory using the
command.
At the time of a normal boot (cold start or by using the reload command) the switch will always run from
the certified directory.
If the RUNNING DIRECTORY is the certified directory, you will not be able to save any changes made
to the RUNNING CONFIGURATION. If the switch reboots, any configuration changes will be lost. In
order to save configuration changes the RUNNING DIRECTORY cannot be the certified directory.
You can determine where the switch is running from by using the
described in
"Show Currently Used Configuration" on page
Software Rollback Feature
The directory structure inherent in the CMM software allows for a switch to return to a previous, more
reliable version of image or configuration files.
Initially, when normally booting the switch, the software is loaded from the certified directory. This is the
repository for the most reliable software. When the switch is booted, the certified directory is loaded into
the RUNNING CONFIGURATION.
Changes made to the RUNNING CONFIGURATION will immediately alter switch functionality.
However, these changes are not saved unless explicitly done so by the user using the
command. If the switch reboots before the RUNNING CONFIGURATION is saved, then the certified
directory is reloaded to the RUNNING CONFIGURATION and configuration changes are lost.
New image or configuration files should always placed in the working or or a user-defined directory first.
The switch can then be rebooted from that directory and be tested for a time to decide whether they are
reliable. Once the contents of that directory are established as good files, then these files can be saved to
the certified directory and used as the most reliable software to which the switch can be rolled back in an
emergency situation.
Should the configuration or images files prove to be less reliable than their older counterparts in the certi-
fied directory, then the switch can be rebooted from the certified directory, and "rolled back" to an earlier
version.
page 3-4
3-16.
OmniSwitch AOS Release 7 Switch Management Guide
Managing CMM Directory Content
reload from
show running-directory
write memory
command
March 2011
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