Cisco Headend Digital Broadband Delivery System Notas de publicación
4023675 Rev B
5
Site Requirements
Site Requirements
This section provides information to help you prepare for the upgrade to DTACS 1.2.
Please read this entire section before you upgrade.
Please read this entire section before you upgrade.
Upgrade Logistics
Introduction
This section contains information that can help system operators plan an upgrade to
DTACS 1.2.
DTACS 1.2.
Time to Complete
The entire upgrade to DTACS 1.2 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.
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
maintenance window. See Scheduling Requirements (on page 6) for additional
details.
maintenance window. See Scheduling Requirements (on page 6) for additional
details.
Supported Upgrade Path
Note these important upgrade requirements:
To perform the software upgrade, the DTACS must currently be operating
DTACS 1.1 or later.
DTACS 1.1 or later.
The upgrade software is on DVD. For upgrade instructions, refer to the DTACS
1.2 Installation and Operation Guide (part number 4036705). Rollback procedures
and software are also provided in the event that the upgrade is unsuccessful.
1.2 Installation and Operation Guide (part number 4036705). Rollback procedures
and software are also provided in the event that the upgrade is unsuccessful.
Some tasks must be performed on the DNCS (Digital Network Control System).
Refer to the DTACS 1.2 Installation and Operation Guide (part number 4036705) for
details.
Refer to the DTACS 1.2 Installation and Operation Guide (part number 4036705) for
details.
System Performance Impact
Interactive services will not be available during the maintenance window.