Version 6.6 817 October 2014
Installation & Operation Manual 46. Online Software Upgrade
46.3.5 Pre-installing OS Patches
When upgrading between major software versions, a considerable amount of OS
patches must be installed on each SC board. These OS patches provide better
security and overall system stability.
The time of the OS patches installation varies depending on the hardware revision of
the SC boards installed in your chassis. For SC Rev.1 boards, the OS patches
installation may take up to 1 hour for each SC board. For SC-.2 boards, the OS
patches installation typically takes less than 5 minutes.
Note: Upgrade between major software versions on a chassis with SC Rev.1
boards (using the Solaris OS) may take more than 3 hours due to the amount of
OS patches that must be installed on each SC board. Plan your upgrade
maintenance time period accordingly or pre-install the OS patches prior to starting
the upgrade as described in this section.
To reduce Online Software Upgrade time, you may pre-install OS patches on both SC
boards prior to starting the Online Software Upgrade. The pre-installation of OS
patches does not interrupt Media Gateway service. Old software continues to runs
normally on a system with new OS patches installed.
The Online Software Upgrade is significantly faster if OS patches are pre-installed
beforehand. It will typically take approximately 1 hour depending on the amount of
Media Gateway boards and the configured Graceful Shutdown period.
See 'Installing OS Security Patches from a Latest Installation Package' on page 313.
46.3.6 EMS Verifications
Before performing the Online Software Upgrade, verify the following in EMS:
Both SC boards are Unlocked and Enabled (boards are color-coded Green in
the EMS GUI).
Both Ethernet Switch (ES) boards are Unlocked and Enabled (boards are color-
coded Green in the EMS GUI).
All Media Gateway boards are either Unlocked and Enabled (boards are color-
coded Green in the EMS GUI) or Locked (boards are color-coded Gray in the
EMS GUI).
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