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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
Each service flow has a set of QoS attributes associated with it. These QoS attributes define a particular
class of service and determine characteristics such as the maximum bandwidth for the service flow and
the priority of its traffic. The class of service attributes can be inherited from a preconfigured CMTS
local service class (class-based flows), or they can be individually specified at the time of the creation
of the service flow.
Each service flow has multiple packet classifiers associated with it, which determine the type of
application traffic allowed to be sent on that service flow. Each service flow can also have a Payload
Header Suppression (PHS) rule associated with it to determine which portion of the packet header will
be suppressed when packets are transmitted on the flow.
Figure3 illustrates the mapping of packet classifiers.
Note By default, the system does not enforce any specific QoS profile on the CM. The QoS profile
assigned to the CM depends on the class of service parameters provisioned in the CM’s DOCSIS
configuration file.
Figure3 Classification Within the MAC Layer
DOCSIS 1.1 Type of Service Overwrite
This feature allows you to overwrite the ToS byte in the IP datagrams received on the upstream before
forwarding them downstream.