Cisco uBR10012 Software Configuration Manual page 41

Chapter 1 Overview of Cisco uBR10012 Universal Broadband Router Software
DOCSIS 1.0 Configuration File Settings
Refer to these sections for additional information about DOCSIS configuration files:
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For additional information about configuring DOCSIS QoS and other DOCSIS features, refer to the
1.1 Feature Module for the Cisco uBR7200 Routers
DOCSIS 1.0 Constant Bit Rate Extension
This DOCSIS 1.0 extension enables better processing of higher-priority traffic; fields in the DOCSIS
configuration file can be used so that when a CM requests a voice SID, the MAC scheduler on the
Cisco uBR10012 router schedules fixed periodic slots on the upstream for that traffic flow. The CM does
not have to contend for these slots and, because the Cisco uBR10012 router controls the timing of slots,
it has precise control over potential delay and jitter.
DOCSIS 1.0 MAC Driver
This DOCSIS 1.0 driver supports CableLabs specifications for the MAC sublayer and associated
interfaces. Refer to the
Throughput" section on page
DOCSIS 1.0 Quality of Service Support
Cisco uBR10012 router software offers DOCSIS 1.0 Quality of Service (QoS) support. This allows you
to define service levels in order to map data packets efficiently into traffic classes. These traffic classes
determine how network resources are allocated and controlled. QoS can be delivered through a combined
use of IP precedence ToS bits and QoS capabilities of IP and ATM core networks.
Cisco uBR10012 router software supports varying QoS definitions for differentiated services:
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Additional information about the capabilities and configuration of DOCSIS QoS are described the
following documents:
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DOCSIS 1.0 MAC Enhancements to Improve Upstream per CM Data Throughput
DOCSIS 1.0 supports tiered best-effort and CIR-type service. The Cisco uBR10012 router and CMTS
now support a mechanism to dynamically initiate and terminate MAC-level scheduling for high-priority
traffic, and to specify exactly what QoS parameters to use.
OL-1520-05
"DOCSIS 1.0 Constant Bit Rate Extension" section on page 1-21
"DOCSIS 1.0 Traffic Shaping and Rate Limiting Features" section on page 1-24
"DOCSIS 1.1 Subscriber Management" section on page 1-39
"DOCSIS 1.0 MAC Enhancements to Improve Upstream per CM Data
1-21.
Guaranteed-rate service queue to store bandwidth requests from CMs subscribing to a class with
minimum upstream rate on the upstream channel.
Best-effort service queue to store bandwidth requests from CMs subscribing to a class with no
minimum upstream rate on the upstream channel.
Service priority of 7 to 0; a higher value indicates better service.
Maximum allowed upstream rate in bps.
Maximum upstream channel burst in minislots.
Minimum reserved upstream rate in bps.
Maximum allowed downstream rate in bps.
DOCSIS 1.1 Feature Module for the Cisco uBR7200 Routers
Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
Cisco IOS Quality of Service Solutions Command Reference, Release 12.2
Supported Software Features for the Cisco uBR10012 Router
on Cisco.com and to other documents cited below.
Cisco uBR10012 Universal Broadband Router Software Configuration Guide
DOCSIS
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