H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – QoS
H3C S7500 Series Ethernet Switches Chapter 1
QoS Configuration
1-1
Chapter 1 QoS Configuration
 Note:
Type A line processing units (LPUs) include LS81FT48A, LS81FM24A, LS81FS24A,
LS81GB8UA, LS81GT8UA, LS81FT48, LS81FM24, LS81FS24, LS81GB8U and
LS81GT8U.
When performing QoS configuration, go to these sections for information you are
interested in:
z Overview
z QoS Supported by the S7500 Series Ethernet Switches
z Setting Port Priority
z Configuring Priority According to Which a Packet is Put into an Output Queue
z Configuring Priority Marking
z Configuring Rate Limiting on a Port
z Configuring TP
z Configuring Redirect
z Configuring Queue Scheduling
z Configuring Congestion Avoidance
z Configuring Traffic Statistics
z Configuring Guaranteed Bandwidth
z Configuring Inbound CAR
z Configuring Traffic-Based Selective QinQ
z QoS Configuration Examples
1.1 Overview
QoS (Quality of Service) is a concept generally existing in occasions with service
supply and demand. It evaluates the ability to meet the need of the customers in service.
Generally, the evaluation is not to grade precisely. Its purpose is to analyze the
conditions when the service is the best and the conditions when the service still needs
improvement and then to make improvements in the specified aspects.
In internet, QoS evaluates the ability of the network to deliver packets. The evaluation
on QoS can be based on different aspects because the network provides various
services. Generally speaking, QoS is the evaluation on the service ability to support the
core requirements such as delay, delay variation and packet loss ratio in the packet
delivery.