iTable of Contents1 QoS Configuration·····································································································································1-1Overview ·················································································································································1-1Introduction to QoS··························································································································1-1Traditional Packet Forwarding Service····························································································1-1New Applications and New Requirements ······················································································1-1Major Traffic Control Techniques ····································································································1-2QoS Supported By Switch 4500 Series ··································································································1-3Introduction to QoS Functions ················································································································1-3Traffic Classification ························································································································1-3Priority Trust Mode ··························································································································1-4Protocol Priority ·······························································································································1-7Priority Marking································································································································1-8Traffic Policing ·································································································································1-8Line Rate ·········································································································································1-9VLAN Mapping ································································································································1-9Queue Scheduling ···························································································································1-9Congestion Avoidance···················································································································1-12Traffic mirroring ·····························································································································1-13QoS Configuration·································································································································1-13Configuring Priority Trust Mode·····································································································1-13Configuring the Mapping between 802.1p Priority and Local Precedence ···································1-14Setting the Priority of Protocol Packets ·························································································1-15Marking Packet Priority··················································································································1-16Configuring Traffic Policing ···········································································································1-17Configuring Line Rate····················································································································1-18Configuring VLAN Mapping···········································································································1-19Configuring Queue Scheduling ·····································································································1-19Configuring WRED ························································································································1-21Configuring Traffic Mirroring ··········································································································1-22Displaying and Maintaining QoS···········································································································1-23QoS Configuration Examples················································································································1-24Configuration Example of Traffic policing and Line Rate ······························································1-24Configuration Example of Priority Marking and Queue Scheduling ··············································1-25VLAN Mapping Configuration Example·························································································1-26
