Cisco Headend System Release 2.5 Installation Guide
Establish a Download Sequence
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Establish a Download Sequence
Establishing a Sequence for Downloading Software onto Each MQAM
The order in which you download new software onto MQAMs 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 to MQAMs. 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 MQAM modulator
If you are downloading new software to more than one MQAM 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.
xOD/VOD Sessions
When upgrading MQAMs that carry xOD or VOD sessions, we suggest that you
When upgrading MQAMs 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 MQAMs act as spares, download the software on these modulators first.
2 If your system does not have a spare MQAM, download the software on the
1 If any MQAMs act as spares, download the software on these modulators first.
2 If your system does not have a spare MQAM, download the software on 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 MQAMs that carry broadcast sessions, upgrade the modulators in
When upgrading MQAMs that carry broadcast sessions, upgrade the modulators in
one hub, four modulators at a time, and verify their functionality before proceeding
to other MQAMs 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 MQAMs act as spares, download the software on these modulators first.
2 If your system does not have a spare MQAM, download the software on the
1 If any MQAMs act as spares, download the software on these modulators first.
2 If your system does not have a spare MQAM, download the software on the
modulator carrying sessions that are least viewed.