Cisco Headend System Release 2.5 Release Notes

 

14 

4002179 Rev B 

This section contains information that can help system operators plan the upgrade to 

SR 4.2.1. 

 

Note these important upgrade requirements: 

 

Systems that upgrade to SR 4.2.1 must currently be operating with system 

software from  SR 2.2 or SR 3.2, or later, as well as DHCT client operating system 

(OS) 3.1 or later. The upgrade software is contained in a UniPack due to 

significant changes contained in SR 4.2.1 and other timesaving factors. Rollback 

procedures and software are included in the UniPack installation instructions in 

the event that the upgrade is unsuccessful. 

 

Our field service engineers or the system operator must have already installed 

the DNCS Utilities software onto the DNCS and should have already run the 

pre-upgrade checks to ensure system compatibility with SR 4.2.1 UniPack 

upgrade requirements. Refer to the DNCS Utilities Installation and Operation Guide 

for instructions on installing and executing the DNCS Utilities. 

Important: You can now use Live Upgrade with the UniPack. Through the use of 

Live Upgrade, engineers can upgrade without shutting down the system processes 

until you activate the new system software. 

 

The actual upgrade to SR 4.2.1 must be completed within a single maintenance 

window that usually starts around midnight. A few pre-upgrade procedures, 

consisting mainly of system checks, backups, and various operations upon the 

metadevices of the DNCS, can be completed before the maintenance window begins. 
Our engineers have determined that a typical site can be upgraded within one 

maintenance window. See Scheduling Requirements (on page 18) for additional 

details. 

 

Interactive services will not be available during the maintenance window.