Information About Policy Types
The device supports a number of policy types. You create class maps in the policy types.
There are three policy types:
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Network-qos
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Queuing
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QoS
The following QoS parameters can be specified for each type of class:
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Type network-qos—A network-qos policy is used to instantiate system classes and associate parameters with those classes that are of system-wide scope.
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Classification—The traffic that matches this class are as follows:
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QoS Group—A class map of type network-qos identifies a system class and is matched by its associated qos-group.
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Policy—The actions that are performed on the matching traffic are as follows:
Note
A network-qos policy can only be attached to the system QoS target.
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Type queuing—A type queuing policy is used to define the scheduling characteristics of the queues associated with system classes.
Note
Some configuration parameters when applied to an EtherChannel are not reflected on the configuration of the member ports.
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Classification—The traffic that matches this class are as follows:
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QoS Group—A class map of type queuing identifies a system class and is matched by its associated QoS group.
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Policy—The actions that are performed on the matching traffic are as follows:
Note
These policies can be attached to the system qos target or to any interface. The output queuing policy is used to configure output queues on the device associated with system classes.
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Bandwidth—Sets the guaranteed scheduling deficit weighted round robin (DWRR) percentage for the system class.
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Priority—Sets a system class for strict-priority scheduling. Only one system class can be configured for priority in a given queuing policy.
Note
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Type qos—A type qos policy is used to classify traffic that is based on various Layer 2, Layer 3, and Layer 4 fields in the frame and to map it to system classes.
Note
Some configuration parameters when applied to an EtherChannel are not reflected on the configuration of the member ports.
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Classification—The traffic that matches this class are as follows:
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Access Control Lists—Classifies traffic based on the criteria in existing ACLs.
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Class of Service—Matches traffic based on the CoS field in the frame header.
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DSCP—Classifies traffic based on the Differentiated Services Code Point (DSCP) value in the DiffServ field of the IP header.
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IP Real Time Protocol—Classifies traffic on the port numbers used by real-time applications.
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Precedence—Classifies traffic based on the precedence value in the type of service (ToS) field of the IP header.
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Policy—The actions that are performed on the matching traffic are as follows:
Note
This policy can be attached to the system or to any interface. It applies to input traffic only.
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QoS Group—Sets the QoS group that corresponds to the system class this traffic flow is mapped to.
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