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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-05
Chapter1 Overview of Cisco uBR7200 Series Software
cops tcp window-size
• The show cable modem remote-query command displays the collected information:
–
Downstream receive power level
–
Downstream signal/noise ratio (SNR)
–
Upstream power level
–
Transmit timing offset
–
Micro reflection (in dB)
For additional information about the enhanced modem status display, refer to Modem Status
Enhancements for the Cisco uBR7200 Series Cable Router on Cisco.com.
Entity MIB, Phase 1
For a complete list of MIBs supported by the Cisco uBR7200 series platform, refer to the Cisco uBR7200
Series Software Release Notes on Cisco.com:
http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_rout/ub7200rn/index.htm
For descriptions of supported MIBs and how to use MIBs, refer to the Cisco MIBs web page on Cisco.com.
Load Balancing for the Cisco CMTS
The Load Balancing on the Cisco CMTS feature allows service providers to optimally use both
downstream and upstream bandwidth, enabling the deployment of new, high-speed services such as voice
and video services. This feature also can help reduce network congestion due to the uneven distribution of
cable modems across the cable network and due to different usage patterns of individual customers.
By default, the Cisco CMTS platforms use a form of load balancing that attempts to equally distribute
the cable modems to different upstreams when the cable modems register. You can refine this form of
load balancing by imposing a limit on the number of cable modems that can register on any particular
upstream, using the cable upstream admission-control command.
However, this default form of load balancing affects the cable modems only when they initially register
with the Cisco CMTS. It does not dynamically rebalance the cable modems at later times, such as when
they might change upstream channels in response to RF noise problems, or when bandwidth conditions
change rapidly because of real-time traffic such as Voice over IP (VoIP) and video services. It also does
not affect how the cable modems are distributed among downstream channels.
For more information about the Load Balancing feature, refer to the following document on Cisco.com:
• Configuring Load Balancing on the Cisco CMTS
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122bc/122b
c_15/cmtslbg.htm
Management Information Base (MIB) Changes and Enhancements
MIB enhancements in Cisco IOS Release 12.3(17a)BC provide enhanced management features that
enable the CiscouBR 7200 Series router and the CiscouBR10012 router to be managed through the
Simple Network Management Protocol (SNMP). These enhanced management features allow you to:
• Use SNMP set and get requests to access information in Cisco CMTS universal broadband routers.
• Reduce the amount of time and system resources required to perform functions like inventory
management.
• A standards-based technology (SNMP) for monitoring faults and performance on the router.