Managing Cmm Directory Content; In This Chapter - Alcatel-Lucent OmniSwitch AOS Release 6 Manual

The CMM (Chassis Management Module) software runs the OmniSwitch Series switches. Each
OmniSwitch chassis can run with two CMMs to provide redundancy also full traffic throughput; one
CMM is designated as the primary CMM, and the other is designated as the secondary CMM. One CMM
or the other runs the switch, or both at the same time to provide full traffic throughput.The directory struc-
ture 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 Stackable Series switches can be linked
together as a stack. An OmniSwitch Stackable Series stack can provide CMM redundancy; one switch is
designated as the primary CMM, and one is designated as the secondary CMM. One CMM 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.
Note. Mixing different OmniSwitch Stackable Series switches together in the same stack is not supported.
Management of the stack is run by the stack configuration software. A detailed description of the stack
configuration software and how it works is provided in the "Managing Stacks" chapter found in the appro-
priate Hardware Users Guide.

In This Chapter

This chapter describes the basic functions of CMM software directory management and how to implement
them by using the Command Line Interface (CLI). CLI commands are used in the configuration exam-
ples; 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
•
A description of how to restore older versions of files and prevent switch downtime is described in
"Software Rollback Feature" on page
•
The CLI commands available for use and the correct way to implement them are listed in
the Directory Structure (Non-Redundant)" on page
•
The CLI commands and issues involved in managing the directory structure of a stack with redundant
CMM software is described in
•
Upgrading switch code using ISSU described in
OmniSwitch AOS Release 6 Switch Management Guide
5 Managing CMM
Directory Content
5-4.
5-5.
5-14.
"Managing Redundancy in a Stack and CMM" on page
"In-Service Software Upgrade" on page
July 2010
"Managing
5-25.
5-31.
page 5-1