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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
•EtherChannel Support on the Cisco uBR10012 Universal Broadband Router
•Management Information Base (MIB) Changes and Enhancements
•MIBs Changes and Updates in Cisco IOS Release 12.3(9a)BC
•Pre-equalization Control for Cable Modems
•Route Processor Redundancy Support
•Secure Socket Layer Server for Usage-Based Billing
•SFID Support for Multicast and Cable Interface Bundling
•Simple Network Management Protocol Cable Modem Remote Query
•Simple Network Management Protocol v3
•Spectrum Management
•Advanced Spectrum Management Support on the Cisco uBR10012 CMTS
•Static CPE Override (cable submgmt default Command)
•Statistical Counters
•Subscriber Traffic Management (STM) Version 1.1
•Usage Based Billing (SAMIS)
Admission Control for the Cisco CMTS
Cisco IOS Release 12.3(13a)BC introduces Admission Control for the Cisco Cable Modem Termination
System (CMTS).
Admission Control for the Cisco Cable Modem Termination System (CMTS) is a multifaceted feature that
implements a Quality of Service (QoS) policy on the CMTS Headend. Admission Control establishes
efficient resource and bandwidth utilization in a way that was not possible in prior Cisco IOS releases.
Admission Control monitors multiple system-level resources on the Cisco CMTS, and performs automatic
resource allocation on a service-request basis. Admission Control maintains optimal system-level operation
by preventing resource consumption that would otherwise degrade the performance for the entire Cisco
CMTS. Furthermore, Admission Control can allocate upstream or downstream bandwidth resources to
specific DOCSIS traffic types, and maintain such prioritization amidst very dynamic traffic conditions.
Admission Control uses two event types for resource monitoring and management—cable modem
registration and dynamic service (voice call) requests. When either of these two events occurs on the
Cisco CMTS, Admission Control verifies that the associated resources conform to the configured limits
prior to admitting and supporting the service call request.
Admission Control is not a mechanism to apply QOS to the traffic flows. Scheduling and queuing are
some of the mechanisms used for implementing the QOS. The QOS is applied on a per-packet basis.
Admission Control checks are performed before the flow is committed.
Admission Control in Cisco IOS Release 12.3(13)BC monitors the following resources on the Cisco
CMTS.
• CPU utilization—Admission Control monitors CPU utilization on the Cisco CMTS, and preserves
QoS for existing service flows when new traffic would otherwise compromise CPU resources on the
Cisco CMTS.
• Memory resource utilization (I/O, Processor, and combined total)—Admission Control monitors
one or both memory resources and their consumption, and preserves QoS in the same way as CPU
utilization.