Cisco Headend System Release 2.5 Installation Guide
78-738190-01 Rev B
SR 2.5 and SR 3.5 Post Upgrade Procedures
5-37
Change the DNCS Data Pump Rates,
Continued
Out-of-Band Data Carousel Recommendations
Keep the following points in mind when configuring OOB data carousels:
•
•
When configuring out-of-band data carousel rates on the DBDS, Cisco
recommends that the total of all out-of-band data carousel rates be kept as low as
possible, in order to maximize the amount of data bandwidth available for
applications.
Note: Output from the Doctor Report will alert you when the sum of your out-of-
Note: Output from the Doctor Report will alert you when the sum of your out-of-
band data carousel rates is greater than or equal to 0.35 Mbps.
•
The indication interval should be 200 ms.
Inband vs. Out-of-Band Considerations
When deciding whether to assign files to an inband carousel or to an out-of-band
carousel, keep the following points in mind:
•
•
Out-of-band data transfer rates are considerably slower than inband data transfer
rates. Consider how fast of a transfer time you require. If a fast data transfer rate is
essential, then assigning the file to an inband data carousel may be more beneficial
than assigning that file to an out-of-band data carousel.
•
If an application requires access to files while simultaneously allowing the user to
watch video, then you should assign files for that application to an out-of-band
carousel. If these application files are assigned to an inband carousel, video will be
interrupted during file retrieval.
Note: In a dual-tuner Digital Video Recorder (DVR) configuration, if the second
Note: In a dual-tuner Digital Video Recorder (DVR) configuration, if the second
tuner is available, that set-top can access application files from an inband carousel
without interrupted video. If both tuners are in use, however, video will be
interrupted during inband file retrieval.
•
You can assign files for applications that do not allow the user to watch video
while using the application to either the inband or out-of-band carousel,
depending upon the size and the performance requirements of the application.