Cisco Headend Digital Broadband Delivery System Release Notes
Chapter 2 What Are the Site Requirements?
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4022291 Rev C
Scheduling Requirements
How Long Does It Take to Complete the Upgrade?
With the live upgrade, your site only needs to be down for 2 to 3 hours during the
entire upgrade process. Most of the upgrade procedures have no system impact. You
can perform the pre-install and pre-upgrade steps at any time of day. However, the
actual upgrade process normally takes place during a maintenance window
beginning at midnight. The following table describes each upgrade process.
entire upgrade process. Most of the upgrade procedures have no system impact. You
can perform the pre-install and pre-upgrade steps at any time of day. However, the
actual upgrade process normally takes place during a maintenance window
beginning at midnight. The following table describes each upgrade process.
Process
Length of
Time
Time
Activity
Pre-install
1-3 hours
Activities are performed by Cisco Services, including
checking the overall health of the system. These activities do
not impact the system.
checking the overall health of the system. These activities do
not impact the system.
Pre-upgrade 3-4 hours
Backing up the system:
Back up the system components
Back up the DNCS and Application Server files
Complete system checks
These activities do not impact the system.
Upgrade
6-8 hours total;
2-3 of these
hours require
system outage
2-3 of these
hours require
system outage
Note: Actual
time may vary
based on the
number of
devices being
upgraded.
time may vary
based on the
number of
devices being
upgraded.
Upgrade the DBDS network:
Back up the DNCS database
Install the DNCS and Application Server software
Determine which optional features (licensed or
unlicensed) need to be enabled as a result of this
upgrade
unlicensed) need to be enabled as a result of this
upgrade
Install and download the component software (QAM,
MQAM, GQAM, and QPSK modulator)
MQAM, GQAM, and QPSK modulator)
Reboot the hardware
Complete functional checks
QPSK modulator upgrades and some QAM and MQAM
upgrades can be completed with little or no subscriber
impact. However, 2-3 hours of the upgrade require system
outage.
upgrades can be completed with little or no subscriber
impact. However, 2-3 hours of the upgrade require system
outage.
Post-
Upgrade
Upgrade
3-4 hours
Back up the system:
Back up the file system
Back up the DNCS database
These activities do not impact the system.