Cisco DNCS System Release 2.7 3.7 4.2 Installation Guide

 

78-4003052-01 Rev G 

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If you are loading new code for new device types, you can schedule the installation 

at any time. There is no impact on existing devices or normal system operations. 
Phase Two can impact your ability to stage some DHCTs. During this phase, you 

might not be able to stage DHCTs being upgraded using the OSM download method 

until the new client application platform software is installed. CVT testing can be 

completed without impacting staging. 
Phase Three impacts your subscribers' viewing experiences. Carefully plan and 

schedule the installation so that the impact is minimal to your subscribers. The 

impact is based on the download option you select, as follows: 

 

Normal (CVT) or Deferred (OSM) download—Lets the DHCT load software after 

it is powered off for 2 minutes 

 

Immediate (CVT) or Download Now No Reply (OSM) download—Happens in a 

relatively short period of time, but interrupts watching TV, PPV, VOD, and other 

services 

 

Until you actually download the software across your system, there is no 

performance impact to your subscribers. After the system-wide download is started, 

any device being upgraded is unavailable while downloading the software. 

Therefore, Cisco recommends that you perform Phase Three of these procedures 

during a maintenance window.  
In addition to the outage caused by loading the software, two-way hosts and DHCTs 

will have to re-establish their network connections. This can cause interactive 

services to be temporarily unavailable after a software download. 

 

Each of the "Phase" chapters in this document provides a checklist of the tasks 

required for that phase. After you complete each phase, save a copy of the checklist 

and all of the results from any tests that you run. You should not proceed to the next 

phase until the checklist for the previous phase is complete.