Alcatel Carrier Internetworking Solutions 6648 - Manual (Page 352)

Chassis Management Module (CMM)
page -28 OmniSwitch Troubleshooting Guide September 2005
Functional Description of CMM
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 Software Startup Process
CMM startup process consists of the following steps:
• Boot ROM
• Vx Works Flash File System
• MiniBoot