·
MQC separates
the classification function of a QoS tool from the action (PHB) that the QoS
tool wants to perform.
·
There are 3 major commands with MQC, with several
subordinate commands:
o Class-map: define the matching parameters for
classifying packets into service classes
o Policy-map: Under this command the PHB
actions(marking, queuing, and so on) are configured
o Service-map: under this command a policy map is
enabled on an interface.
·
QoS policy treat packets in one off 2 categories,
called QoS service classes.
·
Classify the packets into 2 classes for the use of
calling the two class-map commands
·
Each class-map command would be followed by match
subcommand
§ Match
subcommand defines the actual parameters that are compared to the frame/packet
header contents to match packets for classification.
·
For each class, some QoS action (PHB) is to be
performed.
o This action
is configured using the policy-map command
o Under a
single policy map, multiple classes can be referenced
·
When the service-policy command is applied to
an interface,
o the QoS
features are enabled either inbound or outbound on that interface
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