Cisco CableCARD, Руководство по эксплуатации

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Appendix C
Setting Up Multiple Bootloader Carousels
140 734375 Rev H
Setting Up Multiple Bootloader Carousels
This section provides an overview of the steps required to set up more than one
bootloader carousel and configure DHCTs to use the correct carousel when
downloading images.
Note: You must have DNCS System Release 4.3 or later to use the multiple
bootloader feature.
1 Verify that the BFS QAM has enough bandwidth to support a second bootloader
carousel. To make this determination, go to
Determine Available Bandwidth for
Multiple Bootloaders (on page 140).
2 Add the new bootloader carousel to the DHCT by adding a bootloader source
with the following characteristics to the BFS Administration window.
Note: For assistance adding a bootloader source to the BFS Administration
window, go to Adding a Bootloader Source to the DNCS (on page 142).

Source Name - Enter a name to describe this source; for example,
Bootloader2 .

Source ID - Ideally, we recommend that you select an even number that is
not in use and that is greater than 200 to correspond with our numbering
convention.

Source Type - Select Bootloader .

Transport Type - Select ASI In-band .

Data Rate - The rate depends on several factors, including the DHCT type,
the BFS QAM setting, and the available bandwidth. When you make this
decision, select a rate between 1.00 and 3.00 Mbps. For assistance, refer to
Recommendations for Data Carousel Rate Management Technical Bulletin (part
number 716377).
Important: When you stage SCC DHCTs, use a data rate of 3.00 Mbps.

Block size - Enter 4000 .

Indication Interval - Enter 100 .

DataPump - Set to run .
Note: If your system uses the RCS feature, skip this field.

Selected Hosts - Select the same hosts as the main Bootloader source.