Version 6.6 813 October 2014
Installation & Operation Manual 46. Online Software Upgrade
46.2 Pre-Upgrade Configuration Backup
Prior to performing the Online Software Upgrade, you must manually perform a full
Media Gateway software backup and store it on a third-party server. This backup
maintains the ability to rollback the Media Gateway to the pre-upgrade state in the
event of abnormal hardware and/or software failure during the upgrade.
Note: This backup should be used in emergency cases only, since Online Software
Upgrade has a built-in rollback functionality that enables roll-back to the pre-
upgrade software version and configuration.
For details on performing a backup, see 'Media Gateway Software Backup/Restore
Procedures' on page 774.
46.3 Preparing for the Online Software Upgrade
46.3.1 Preparing the Media Gateway
The following conditions must be met prior to starting the Online Software Upgrade
procedure:
Both SC boards are in service.
Both ES boards are in service and have up-links properly connected.
All Media Gateway boards are either in service or manually LOCKED.
Note: There is no HA functionality available during Online Software Upgrade,
therefore all Media Gateway components must be stable during the upgrade.
Remove or LOCK any unstable board prior to starting the upgrade.
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