Nortel 1000E Maintenance Manual page 159

Figure 22
Element remote upgrade flow
New software is distributed as single, packed and compressed workfiles that
are named to uniquely identify their type (SSC or Media Card) and version.
Workfiles are placed in a directory on a node primary SSC. Workfiles can
be delivered directly on a CD-ROM drive on the Signaling Server using CLI
or Web maintenance menus. Workfiles can also be delivered through the
network on a Web interface (for example, workfiles come from the Web
browser workstation).
Workfiles for SSCs and Media Cards can be on the primary SSC, but each
node is managed separately. If the primary SSC on which the workfiles
were originally placed becomes unavailable, then the workfiles must now
be placed on the new primary SSC. The technician validates the version
of a workfile before initiating a remote upgrade.
The elements are notified individually to download and process a new
workfile. To limit service interruption, an element must be disabled before it
is upgraded. Software upgrades are typically timed to minimize the impact.
With the Web interface, you can select multiple elements to disable and
upgrade. However, with the CLI you can only select one element at a time.
The primary SSC is upgraded separately from the other elements because
the upgrade procedure includes a disable and a reboot. A reboot interrupts
Web service and can interrupt other element upgrades.
The element upgrade trigger mechanism delivers appropriate parameters to
the elements to perform the upgrade, including the following:
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•
Copyright © 2007, Nortel Networks
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software server address
logon and password
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 01.02 Standard
Release 5.0 20 June 2007
Remote upgrade 159