Alcatel Carrier Internetworking Solutions 8800 User Manual

Chassis Management Module (CMM)

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OmniSwitch Troubleshooting Guide

Software and Configuration management is implemented in such a way to provide the operator with:

• Flexibility

• Resiliency

• And to minimize the service interruption during the update of a network.

• 2 Software versions are stored into flash:

• 1 working version: operational release, used for upgrades.

• 1 certified version: operator validated trusted release.

• Automatic rollback from the working version to the certified version in case of failure of the working 

version.

• Possibility to certify a version when the operator has considered its behavior acceptable

• All of the files making up the “working” software release must be contained in “/flash/working” direc-

tory.

• All of the files making up the “certified” software release must be contained in “/flash/certified” direc-

tory.

• The “boot.params” file stored in “/flash” is the configuration file that contains the system boot parame-

ters as well as the Image Rollback variables. The two software releases use the same boot parameters 
and Image Rollback variables.

• New software version can be activated by loading the images in “/flash/working” and rebooting the 

switch in working directory using the command “reload working no roll-back timeout”

• A running “working” version can be certified any time after the “working” version is loaded and veri-

fied.

• The configuration file of a certified software version cannot be modified while working with “certi-

fied” version.

• If the working version is certified and the switch is rebooted or reboots for any other reason, it will 

boot up in the new certified version.

• If the working and certified versions of code as well as configurations are completely synchronized the 

switch will boot up in certified directory but the running directory will be set to “working”. This flexi-
bility allows to modify configurations and save them. Certification of the new configurations will be 
required to save the configurations in certified directory. 

CMM startup process consists of the following steps:

• Boot ROM

• Vx Works Flash File System

• MiniBoot