Reference Guide

Conguring QoS is a three-step process:
1 Create class-maps to classify the trac ows. The following are the dierent types of class-maps:
• qos type(default)—Classies the ingress data trac.
• queuing type—Classies the egress queues.
• control-plane—Classies the control-plane trac.
• network-qos—Classies the set of trac-class IDs for ingress buer congurations.
• application type—Classies the application type trac. The reserved policy-map policy-iscsi denes the actions to be performed
for class-iscsi trac.
2 Create policy-maps to dene the policies for the classied trac ows. The following are the dierent types of policy-maps:
• qos type(default)—Denes the following actions for the qos type classes of trac.
• Policing
• Marking with a trac class ID
• Modifying packet elds such as CoS and DSCP
• Enabling trust based classication
• queuing type—Denes the following actions for the queuing type classes of egress trac.
• Shaping
• Bandwidth assignment for queues
• Strict priority assignment for queues
• Buer conguration for queues
• WRED conguration on queues
• control-plane—Denes the policing of control queues for the control-plane policing on control queues.
• network-qos—Denes the Ingress buer conguration for selected trac-class for the network-qos type classes of trac.
• application type—Denes the following actions for the application classied trac.
• Modify packet elds like CoS and DSCP.
• Mark with a trac class ID.
3 Apply the policy-maps to interface (port), system (all interfaces), or control-plane trac as follows:
• Control-plane polices must be applied on control-plane mode.
• The qos and network-qos policies must be applied in the input direction on physical interfaces or on system-qos mode.
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Quality of service