Cisco Headend System Release 2.5
Chapter 2 Site Requirements
4
4036044 Rev B
Upgrade Logistics
Introduction
This section contains information that can help system operators plan the upgrade to
SR 4.3.1.
Supported Upgrade Path
Note these important upgrade requirements:
Systems that upgrade to SR 4.3.1 must currently be operating with system
software from SR 4.3, as well as DHCT client operating system (OS) 3.1 or later.
The upgrade software is on CD. For upgrade instructions, refer to System Release
2.8.1/3.8.1/4.3.1 CD Upgrade Installation Instructions (part number 4036043).
Rollback procedures and software are also provided in the event that the
upgrade is unsuccessful.
You must already have the DBDS Utilities software installed on the DNCS and
should have already run the pre-upgrade checks to ensure system compatibility
with SR 4.3.1 CD upgrade requirements. Refer to DBDS Utilities Version 6.3
Installation Instructions and User Guide (part number 4031374) for instructions on
installing and executing the DBDS Utilities.
Time to Complete
The entire upgrade to SR 4.3.1 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.
Cisco engineers have determined that a typical site can be upgraded within one
Cisco engineers have determined that a typical site can be upgraded within one
maintenance window. See Scheduling Requirements (on page 7) for additional
details.
System Performance Impact
Interactive services will not be available during the maintenance window.