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中级工程师
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第1页共118页
QOS
目录
概述 ................................................................................................................................. 2
QOS模型 .......................................................................................................................... 2
QOS组件 .......................................................................................................................... 4
MQC(Modular QoS Command-Line) ................................................................................ 5
令牌桶算法(token bucket algorithm) .............................................................................. 8
单速双色 ................................................................................................................... 9
单速三色 ................................................................................................................. 10
双速三色 ................................................................................................................. 12
分类和标记(Classification and Marking) ........................................................................ 13
流(Flow) .................................................................................................................... 16
管制和整形(Policing and Shaping) ................................................................................ 16
配置管制 ................................................................................................................. 17
配置整形 ................................................................................................................. 21
接口直接开启整形 ................................................................................................... 28
Committed access rate (CAR)承诺访问速率 ........................................................................ 30
配置基于接口的CAR ................................................................................................ 31
配置基于ACL的CAR .................................................................................................. 33
配置基于DSCP的CAR ................................................................................................ 36
配置基于MAC地址的CAR ......................................................................................... 38
拥塞管理(Congestion management) ............................................................................. 41
FIFO Queuing (First In First Out Queuing) ............................................................... 41
Priority Queuing (PQ) .......................................................................................... 43
Custom queuing (CQ) ................................................................................................ 46
Weighted Fair Queuing (WFQ) .................................................................................... 50
Class-based WFQ (CBWFQ) ......................................................................................... 53
Low Latency Queuing(LLQ) .................................................................................... 57
IP RTP (Real-Time Transport Protocol) .................................................................... 61
拥塞避免(Congestion avoidance) .................................................................................. 63
Tail Drop .................................................................................................................. 64
Weighted Random Early Detection (WRED) .................................................................. 64
WRED—Explicit Congestion Notification ...................................................................... 68
Frame Relay Discard Dligible (DE) ................................................................................ 71
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