Cisco Systems UBR10012 Downstream Channel ID Configuration, Downstream Frequency Override, Downstream Load Balancing Distribution with Upstream Load Balancing, Dynamic Channel Change (DCC) for Loadbalancing

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Cisco uBR10012 Universal Broadband Router Software Configuration Guide

OL-1520-08

Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software

Supported Software Features for the CiscouBR10012 Router

For additional DSG 1.2 information, refer to the following documents on Cisco.com:

•Advanced-mode DOCSIS Set-Top Gateway 1.2 for the Cisco CMTS

http://www.cisco.com/en/US/products/hw/cable/ps2217/products_feature_guides_list.html

•Cisco CMTS Universal Broadband Router MIB Specifications Guide, Rel 12.3(17a)BC2

http://www.cisco.com/en/US/products/hw/cable/ps2217/products_mib_quick_reference_chapter09

186a00806f06e5.html#wp2098579

Downstream Channel ID Configuration

This operational feature allows all cableinterfaces on the HFC network to identify themselves using

unique downstream channel IDs, instead of their downstream frequencies. CMs communicate their

downstream ID when making a connection, not their downstream frequency. System administrators can

enter a configurable downstream channel ID to a value other than the default. Thus, each downstream

channel ID can be unique on a cable network. For configuration information, refer to “Assigning the

Downstream Channel ID” section on page6.

Downstream Frequency Override

The CiscouBR10012router is able to change the downstream frequency for any or all CMs, overriding the

DOCSIS configuration file settings. For DOCSIS QoS configuration information, refer to the feature module

titled DOCSIS 1.1 for Cisco uBR7200 Series Universal Broadband Routers on Cisco.com.

Downstream Load Balancing Distribution with Upstream Load Balancing

Cisco IOS Release 12.3(17b)BC4 introduces further enhancements to downstream load balancing, resulting

in equalized upstream load balancing group members. This enhancement synchronizes the pending statistic

between different cable interface line cards in the load balancing group.

This enhancement performs downstream load balancing that accounts for loads on upstream channels in the

same upstream load balancing group, rather than on the basis of the entire downstream channel load. Prior

Cisco IOS releases may not have distributed cable modems evenly over individual upstream channels, nor in

a way that accounted for downstream and upstream segment loads that account for one another.

This enhancement applies when downstream load balancing occurs on a headend system with separate

upstream load balancing segments; the upstream segments are spread over multiple downstreams segments.

This enhancement provides an alternative downstream load balancing scheme that accounts and makes use

of per-upstream loads rather than total downstream loads.

For additional information about Load Balancing on the Cisco CMTS, refer to the following documents on

Cisco.com:

•Load Balancing and Dynamic Channel Change on the Cisco CMTS

http://www.cisco.com/en/US/products/hw/cable/ps2217/products_feature_guide09186a00801b17f

2html

•Cisco Broadband Cable Command Reference Guide

http://www.cisco.com/en/US/products/hw/cable/ps2217/products_command_reference_book0918

6a0080108e88.html

Dynamic Channel Change (DCC) for Loadbalancing

Cisco IOS Release 12.3(17a)BC introduces Dynamic Channel Change (DCC) and DCC for Load

Balancing on the Cisco CMTS.