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New and Changed Information
Multicast video sessions may experience longer traffic outage during Supervisor card switchover. For a
small number of SDV sessions (for example, 1,000), the traffic outage is less than four seconds. For a
large number of SDV sessions (for example, 10,000), the traffic outage time is around ten seconds. This
is because, in Cisco IOS Release 12.2(50)SQ1, the underlying multicast function is not SSO-aware
although the video session state is synchronized to the standby Supervisor card. The SSO performance
of multicast video sessions will be improved in a later release.
For more information, see
Pass-through Video Session Enhancements
The following features have been added for pass-through video sessions:
•
•
•
MPTS Multiplexing of Pass-through Sessions
A pass-through session can be multiplexed with other remapped sessions, pass-through sessions, or data
piping sessions into the same QAM channels.
Input PID Filtering
The Input PID Filtering feature enables you to specify a list of PIDs to be dropped for a pass-through
video session. PID filtering is used in scenarios where the SI table is replaced in the BDV digital
broadcast feed. The incoming feed from the video session is a Multiple Program Transport Stream
(MPTS) containing BDV SI tables. These SI tables are replaced with locally generated SI tables. The
PID filtering capability enables the drop of SI tables from the incoming feed. The local SI tables can then
be reinserted from a data piping session to be multiplexed to the QAM channel.
Up to 32 PIDs can be filtered per pass-through session.
The following commands have been modified to support input PID filtering:
•
•
•
For more information, see the
CBR Clock Recovery
The CBR dejittering and clock recovery method assumes all video sessions are variable bit rate (VBR)
by default. This method also works for sessions that are constant bit rate (CBR) sessions. However, in
scenarios where the MPTS input stream contains programs with faulty PCRs, providing the CBR
information helps isolate the faulty PCRs. Isolating the faulty PCRs prevents them from corrupting the
good PCRs within the same input session. The CBR dejittering and clock recovery mode has been added
in Cisco IOS Release 12.2(50)SQ1 to support this.
Release Notes for Cisco RF Gateway 10 in Cisco IOS Release 12.2SQ
14
1:1 Supervisor Card
MPTS Multiplexing of Pass-through Sessions, page 14
Input PID Filtering, page 14
CBR Clock Recovery, page 14
cable video udp port {filter pid pid-list}
asm label {filter pid pid-list}
ssm label {filter pid pid-list}
Redundancy.
Cisco RF Gateway 10 Command Reference
and
Video
guides.
OL-18677-10
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