Juniper M10i 路由器的QoS配置示例

Juniper M10i 路由器的QoS配置示例

一、QoS策略标准

按目前QoS的现有分类标准（缺省VPLS分类器、缺省IP优先分类器、缺省MPLS 分类器、缺省DSCP分类器、缺省IEEE 802.1p分类器、缺省IEEE 802.1ad分类器），由于各厂家品牌不同，同一品牌型号不同，同一型号操作系统版本异样，且各厂家采用标准不一，QoS代码实现也不尽相同。因此，云南铜业（集团）有限公司在《云铜信息系统基础建设技术标准V3》中采用DSCP值与IP优先级对应的方式，定义了集团公司网络中通用的QoS分类值如下：

QoS策略

业务类别优先级要求DSCP值IP优先级适应队列语音应用高CS5 5 LLQ

视频应用高CS4 4 CBWFQ

关键应用低CS3 3 CBWFQ

办公及其它应用无缺省值缺省值CBWFQ

注：①QoS——指Quality of Service，即服务质量。

②VPLS——指Virtual Private LAN Subnet，即虚拟专用LAN子网段。

③MPLS——指Multi-Protocol Label Switching，即多协议标签交换技术。

④DSCP——指Differentiated Services Code Point，即差分服务代码点。

⑤LLQ——指Low Latency Queuing，即低延迟队列。

⑥CBWFQ——指Class-Based Weighted Fair Queuing，即基于类的加权公平队列。

⑥PLP——指Packet Loss Priority，即包丢失优先级。

为确保视频会议数据的流畅，公司提供如下路由器的QoS配置示例，仅供参考。请大家根据各自路由器类型及操作系统版本，制订适合自己的QoS代码实现。

二、M10i路由器QoS配置示例

#①配置Forwarding class的queue，配置每个queue的名字和优先级。

class-of-service forwarding-classes {

queue 7 fcNetwrok priority high;

queue 5 fcVoice priority high;

queue 4 fcVideo priority high;

queue 3 fcKeyApp priority low;

queue 0 fcDefault priority low;

}

#②定义每一个的queue的Classifier。

class-of-service classifiers {

inet-precedence precClassifiers {

forwarding-class fcNetwork {

loss-priority high code-points 111;

}

forwarding-class fcNetwork {

loss-priority low code-points 101;

}

forwarding-class fcVoice {

loss-priority high code-points 101;

}

forwarding-class fcVideo {

loss-priority high code-points 100;

}

forwarding-class fcKeyApp {

loss-priority low code-points 011;

}

forwarding-class fcDefault {

loss-priority low code-points [ 000 001 010 ]; }

}

}

#③配置RED的Drop-Profile的Fill-Level、Drop-Probability。

class-of-service drop-profiles {

dropVoice {

interpolate {

fill-level [ 50 75 100 ];

drop-probability [ 1 50 100 ];

}

}

dropVideo {

interpolate {

fill-level [ 40 70 100 ];

drop-probability [ 1 50 100 ];

}

}

dropKeyApp {

interpolate {

fill-level [ 30 65 100 ];

drop-probability [ 1 50 100 ];

}

dropDefault {

interpolate {

fill-level [ 20 60 100 ];

drop-probability [ 1 50 100 ];

}

}

#④定义Rewrite-Rules。

class-of-service rewrite-rules {

inet-precedence rrMarkPrec {

forwarding-class fcNetwork {

loss-priority high code-point 111;

}

forwarding-class fcVoice {

loss-priority high code-point 101;

}

forwarding-class fcVideo {

loss-priority high code-point 100;

}

forwarding-class fcKeyApp {

loss-priority low code-point 011;

}

forwarding-class fcDefault {

loss-priority low code-point 000;

}

}

}

#⑤配置S chedulers的传送速率，Buffer-size，优先级，drop-profile-map。class-of-service schedulers {

schNetwork {

priority strict-high;

}

schVoice {

transmit-rate percent 5;

buffer-size temporal 5000;

priority high;

}

schVideo {

transmit-rate percent 75;

buffer-size temporal 20000;

priority high;

}

schKeyApp {

transmit-rate percent 5;

buffer-size temporal 5000;

priority low;

}

schDefault {

transmit-rate percent 10;

buffer-size temporal 10000;

priority low;

drop-profile-map loss-priority low protocol tcp drop-profile dropDefault; }

}

#⑥配置S chedulers-Map。

class-of-service scheduler-maps {

schmapNetwork {

forwarding-class fcNetwork scheduler schNetwork;

forwarding-class fcVoice scheduler schVoice;

forwarding-class fcVideo scheduler schVideo;

forwarding-class fcKeyApp scheduler schKeyApp;

forwarding-class fcDefault scheduler schDefault;

}

}

#⑦在端口上应用S chedulers-Map，IP的Classifiers和Rewrite-rules

class-of-service interfaces {

so-0/0/0 {

scheduler-map schmapNetwork;

unit 0 {

classifiers {

inet-precedence precClassifiers;

}

rewrite-rules {

inet-precedence rrMarkPrec;

}

}

}

}

#⑧设置过滤器

Firewall {

Family inet {

Filter filVideo {

Term term1 {

From {

Source-address {

10.160.201.0/24;

}

}

Then forwarding-class fcVideo;

Then accept;

}

Term term2 {

Then forwarding-class fcDefault;

Then accept;

}

}

}

}

#⑨将过滤器应用于接口

Interfaces {

fe-0/1/0 {

unit 0 {

family inet {

filter {

input filVideo;

}

}

}

}

}

注意：①input是指进入该端口的数据包。

②RED——指Random Early Discard，即随机早期丢弃算法。

云南铜业（集团）有限公司规划发展部

2010年7月5日