ADC Telecommunications, Inc.
480 CHAPTER 19: MANAGING CABLE MODEMS
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Classifiers
This section describes Classifiers and explains the process for viewing
Classifiers.
A Classifier is a QoS protocol mechanism that contains a set of matching
criteria that applies to each downstream and upstream packet entering the
cable network. Downstream Classifiers apply to packets that the CMTS is
transmitting. Upstream Classifiers apply to packets that the cable modem is
transmitting.
The matching criteria of a Classifier includes a reference to a Service Flow,
indicated by a Service Flow ID. For example, incoming packets attempt to
match to a Classifier. If the packet matches the Classifier, it is forwarded to
the referenced SFID. If the packet does not match a Classifier, it is forwarded
to the primary Service Flow. Several Classifiers may refer to the same Service
Flow.
You define the matching criteria for Classifiers when you provision cable
modems. For information about provisioning cable modems, refer to the Fa st
Flow Broadband Provisioning Manager CLI-based Administration Guide or
the guide for your third-party provisioning vend or.