Contents
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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
CHAPTER
52 Configuring QoS 52-1
Understanding How QoS Works 52-1
QoS Terminology 52-2
Flowcharts 52-3
QoS Feature Set Summary 52-10
Ethernet Ingress Port Marking, Scheduling, Congestion Avoidance, and Classification 52-12
Classification, Marking, and Policing with a Layer 3 Switching Engine 52-15
Classification and Marking on a Supervisor Engine 1 with a Layer 2 Switching Engine 52-28
Ethernet Egress Port Scheduling, Congestion Avoidance, and Marking 52-28
QoS Statistics Data Export 52-29
QoS Default Configuration 52-30
QoS Configuration Guidelines and Restrictions 52-37
Configuring QoS on the Switch 52-38
Enabling QoS 52-39
Enabling DSCP Rewrite 52-39
Disabling DSCP Rewrite 52-40
Enabling Port-Based or VLAN-Based QoS 52-40
Configuring the Trust State of a Port 52-41
Configuring the CoS Value for a Port 52-41
Creating Policers 52-42
Deleting Policers 52-45
Creating or Modifying ACLs 52-45
Attaching an ACL to an Interface 52-56
Detaching an ACL from an Interface 52-57
Configuring PFC3 Egress DSCP Mutation 52-58
Configuring CoS-to-CoS Maps on 802.1Q Tunnel Ports 52-60
Mapping a CoS Value to a Host Destination MAC Address/VLAN Pair 52-61
Deleting a CoS Value to a Host Destination MAC Address/VLAN Pair 52-62
Enabling or Disabling Microflow Policing of Bridged Traffic 52-62
Configuring the Standard Receive-Queue Tail-Drop Thresholds 52-63
Configuring the 2q2t Port Standard Transmit-Queue Tail-Drop Thresholds 52-63
Configuring the Standard Queue WRED-Drop Thresholds 52-64
Allocating Bandwidth Between the Standard Transmit Queues 52-66
Configuring the Receive-Queue Size Ratio 52-67
Configuring the Transmit-Queue Size Ratio 52-67
Mapping the CoS Values to the Drop Thresholds 52-67
Configuring the DSCP Value Maps 52-73
Displaying QoS Information 52-76
Displaying the QoS Statistics 52-77
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