Cisco Headend System Release 2.7 Mode D'Emploi
About This Guide
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About This Guide
Introduction
Switched digital video (SDV) is a technology that allows cable operators to recover
bandwidth from infrequently-viewed channels, by making these channels “on-
demand.” Instead of sending all channels to the set-top boxes, lightly viewed
channels are put into a switching pool and only sent to the set-top boxes when
viewers tune to them.
bandwidth from infrequently-viewed channels, by making these channels “on-
demand.” Instead of sending all channels to the set-top boxes, lightly viewed
channels are put into a switching pool and only sent to the set-top boxes when
viewers tune to them.
Purpose
This guide provides procedures to help you keep your SDV system running as
expected. This guide explains various tools that you can use to monitor and
troubleshoot SDV systems.
expected. This guide explains various tools that you can use to monitor and
troubleshoot SDV systems.
Scope
The procedures in this document only apply to Digital Broadband Delivery System
(DBDS) networks operating with the Cisco Resident Application (SARA).
(DBDS) networks operating with the Cisco Resident Application (SARA).
System Prerequisites
The Digital Network Control System (DNCS) must meet the following conditions to
support SDV:
support SDV:
Must run System Release (SR) 2.7/3.7 or SR 4.2 Service Pack 2 (SP2), or later
Must have SDV feature enabled for DNCS
Must have SDV feature enabled for the Netcrypt Bulk Encryptor
SSP 2.3 Compliant
What’s New for SDV in this Release?
For each SDV-enabled service group, a mini-carousel discovery file is created. Each
BFS carousel is limited to 475 individual files; and therefore, before SR 2.7/3.7/4.2
SP2, the number of SDV-enabled service groups available on the DNCS was limited
to 475.
BFS carousel is limited to 475 individual files; and therefore, before SR 2.7/3.7/4.2
SP2, the number of SDV-enabled service groups available on the DNCS was limited
to 475.
A new feature in SR 2.7/3.7/4.2 SP2 allows the DNCS, by default, to create four
additional BFS sources to deliver the mini-carousel discovery files. This
enhancement provides for a default total of five carousels, or up to 2,375 SDV-
enabled service groups. See Expand the Number of Available Service Groups
(on page 11) for additional information.
additional BFS sources to deliver the mini-carousel discovery files. This
enhancement provides for a default total of five carousels, or up to 2,375 SDV-
enabled service groups. See Expand the Number of Available Service Groups
(on page 11) for additional information.