Software Upgrade; Online Software Upgrade - Overview - Avaya G860 Installing And Operating

15

Software Upgrade

Online Software Upgrade may be performed on both Redundant systems (with 2 SC
boards available) and Simplex systems (with 1 SC board available). Online Software
Upgrade on a Redundant system is described below. For 'Online Software Upgrade
on Simplex systems'.
In order to distinguish between the two SC boards, the following terms should be
used:
Primary SC – The SC board that is Active before starting the Software upgrade
Secondary SC – The SC board that is Standby before starting the Software upgrade
Note:
15.1 Online Software Upgrade – Overview
An online software upgrade is performed when both SC boards are up and running.
The software upgrade process upgrades software on all of the boards in the chassis:
System Controller boards
Media Gateway boards
Ethernet Switch boards
The gateway continues its operation without interruption during a software upgrade of
the SC software. However, calls are dropped during an upgrade of Media Gateway
boards. To minimize impact on media gateway service, Media Gateway boards are
upgraded one at a time, after a definable graceful shutdown period. The graceful
shutdown period combined by waiting periods following each Media Gateway board
upgrade helps to ensure that the minimum of (or even no) calls are dropped. In any
case, the media gateway's capacity is thus never reduced by more than a single
Media Gateway board's capacity.
To further minimize call traffic loss for the individual Media Gateway boards,
A direct software upgrade from version 2.1 to version 3.2 is not supported.
perform this procedure when low call traffic is known to occur.
Caution
Issue 1 October 2007 159
15. Software Upgrade