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Cisco 220 Series Smart Switches Administration Guide Release 1.1.0.x 248
Quality of Service
The quality of service (QoS) feature is applied throughout the network to ensure
that network traffic is prioritized according to required criteria and the desired
traffic receives preferential treatment.
This chapter includes the following topics:
• QoS Features and Components
• Workflow to Configure QoS Settings
• Configuring QoS Basic Mode
• Configuring QoS Advanced Mode
QoS Features and Components
The QoS feature is used to optimize network performance. QoS provides the
classification of incoming traffic to traffic classes based on the following
attributes:
• Device configuration
• Ingress interface
• Packet content
• Combination of these attributes
QoS includes the following:
• Traffic Classification—Classifies each incoming packet as belonging to a
specific traffic flow, based on the packet contents and/or the port. The
classification is done by ACL, and only traffic that meets the ACL criteria is
subject to cost of service (CoS) or QoS classification.
• Assignment to Hardware Queues—Assigns incoming packets to
forwarding queues. Packets are sent to a particular queue for handling as a
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