Version 6.6 811 October 2014
Installation & Operation Manual 46. Online Software Upgrade
46 Online Software Upgrade
The Online Software Upgrade provides a mechanism for upgrading the Mediant 8000
software to a newer version, while preserving the Media Gateway configuration and
minimizing the affect on the Media Gateway service during the upgrade.
In this section, the following terms are used:
1
st
SC – The SC board that is Active before starting the Software upgrade
2
nd
SC – The SC board that is Standby before starting the Software upgrade
It is recommended to perform the Online Software Upgrade when the SC board in Slot
1 is the Active board and the SC board in Slot 2 is the Standby board. If required,
perform SC switchover to achieve this configuration.
46.1 Overview
The Online Software Upgrade is performed when the Mediant 8000 Media Gateway is
up and running. The Online Software Upgrade upgrades the software on all the Media
Gateway components including:
System Controller (SC) boards
Media Gateway boards
Ethernet Switch (ES) boards
The Media Gateway configuration is preserved throughout the upgrade procedure and
the effect on the Media Gateway service is minimized.
After upgrading each major system component (e.g., the SC or Media Gateway board)
the Online Software Upgrade process pauses and allows you to verify the basic
functionality of the upgraded component. At these "stop points" you can decide
whether to proceed with the upgrade or initiate a roll-back.
The Roll-back functionality enables you to return the Mediant 8000 Media Gateway to
the pre-upgrade software version and configuration in case of any problem.
The Mediant 8000 Media Gateway continues its operation without interruption during
the software upgrade of the SC and ES boards. However, certain calls may be
affected during the upgrade of the Media Gateway boards, depending on the upgrade
mode being used (see sections Hitless Upgrade Mode and Graceful Shutdown Mode
below). To minimize the impact on the Mediant 8000 Media Gateway service, the
Media Gateway boards are upgraded one at a time.
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