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OmniSwitch 6600 Family Switch Management Guide March 2005 page 4-1
4 Managing CMM
Directory Content
The CMM (Chassis Management Module) software runs the OmniSwitch 6600 Family. The directory
structure of the CMM software is designed to prevent corrupting or losing switch files. It also allows you
to retrieve a previous version of the switch software.
In addition to working as standalone switches, the OmniSwitch 6600 Family can also be linked together as
a stack. For example, you could have a stack of four 6624 models, a stack of three 6648 models, or a
combination of the two modules. An OmniSwitch 6600 Family stack can provide CMM redundancy; one
switch is designated as the primary CMM, and one is designated as the secondary CMM. One or the other
runs the switch, but never at the same time. All other switches in a stack are designated “idle” for the
purposes of CMM control.
Management of the stack is run by the stack configuration software. A detailed description of the stack
configuration software and how it works is given in “Managing Stacks” in the OmniSwitch 6600 Family
Hardware Users Guide.
In This Chapter
This chapter describes the basic functions of CMM software directory management and how to implement
them using the Command Line Interface (CLI). CLI commands are used in the configuration examples; for
more details about the syntax of commands, see the OmniSwitch CLI Reference Guide.
This chapter contains the following information:
• The interaction between the running configuration, the working directory, and the certified directory is
described in “CMM Files” on page 4-3.
• A description of how to restore older versions of files and prevent switch downtime is described in
“Software Rollback Feature” on page 4-4.
• The CLI commands available for use and the correct way to implement them are listed in “Managing
the Directory Structure (Non-Redundant)” on page 4-13.
• The CLI commands and issues involved in managing the directory structure of a stack with redundant
CMM software is described in “Managing Redundancy in a Stack” on page 4-24.