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470 C
HAPTER 19: MANAGING CABLE MODEMS
Managing Quality of Service
Quality of Service (QoS) defines the transmission ordering and scheduling on
the Radio Frequency (RF) Interface. To provide for upstream traffic through
the cable modem, DOCSIS 1.1 QoS classifies packets traversing the RF MAC
interface into a Service Flow. To provide for upstream traffic through the
cable modem terminating systems (CMTS), DOCSIS 1.1 QoS classifies
packets prior to traversing the RF MAC interface into a Service Flow.The
Cuda 12000 and cable modems provide this QoS by shaping, policing, and
prioritizing traffic according to a parameter set defined for the Service Flow.
Managing QoS on the Cuda 12000 involves viewing statistics and
configuration of cable modems for QoS protocol mechanisms. The protocol
mechanisms are the following:
■ Service Flows
■ Classifiers
The statistical and configuration information for these protocol mechanisms
is obtained from the associated configuration and provisioning files that
were created for the cable modem during CMTS configuration and cable
modem provisioning.
This section describes service flows and classifiers, and the processes for
viewing the statistics and configuration associated with these QoS
mechanisms. The Cuda 12000 supports QoS as defined by the
Data-Over-Cable Service Interface Specifications, RFI
SP-RFIv1.1-106001215.