Cisco Model D9476 - 16 64 128 256 QAM Modulator Installation Guide
Chapter 2 Upgrading the Software
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78-4024239-01 Rev B
Establish a Download Sequence
Introduction
The order in which you download new software allows you to verify that the
download is successful before proceeding. Follow these guidelines to establish an
order in which to download the new software. The method that you follow depends
on the type of sessions that the modulator carries (xOD/VOD sessions or broadcast
sessions).
CAUTION:
If you are downloading new software to more than one GoQAM modulator
If you are downloading new software to more than one GoQAM modulator
group, download the software to one modulator group (for example, all
modulators in a single rack or hub) and verify its functionality before
attempting to download software to another modulator group. Verifying the
functionality of one modulator group at a time enables you to better isolate
any failures that may occur and enables you to minimize service interruptions.
xOD/VOD Sessions
When upgrading modulators that carry xOD or VOD sessions, we suggest that you
upgrade all modulators in one hub and verify the functionality of those modulators
before upgrading modulators in another hub.
Use the following guidelines to determine the order in which to upgrade modulators
Use the following guidelines to determine the order in which to upgrade modulators
within a hub.
1 If any modulators act as spares, download the software to these modulators first.
2 If your system does not have a spare modulator, download the software to the
1 If any modulators act as spares, download the software to these modulators first.
2 If your system does not have a spare modulator, download the software to the
modulator carrying the fewest number of sessions.
3 Continue downloading the software to modulators by working your way up to
the modulator carrying the most sessions.
Broadcast Sessions
When upgrading modulators that carry broadcast sessions, upgrade the modulators
in one hub, four modulators at a time, and verify their functionality before
proceeding to other modulators in the hub.
Use the following guidelines to determine the order in which to upgrade
Use the following guidelines to determine the order in which to upgrade
modulators:
1 If any modulators act as spares, download the software to these modulators first.
2 If your system does not have a spare modulator, download the software to the
1 If any modulators act as spares, download the software to these modulators first.
2 If your system does not have a spare modulator, download the software to the
modulator carrying sessions that are least viewed.