Identifying Methods for Implementing QoS参考.ppt

Introduction to IP QoS Identifying Methods for Implementing QoS Methods for Implementing QoS Policy Legacy CLI Uses the CLI via console and Telnet通过console接口或Telnet方式进行命令行方式进行配置 Traditional method传统的配置方式 Nonmodular非模块化配置 Cannot separate traffic classification from policy definitions不能将流量分类与策略定义分开配置 Time-consuming and potentially error-prone task极其耗时而且非常容易出错的配置任务 Used to augment, fine-tune newer Cisco AutoQoS method大部分一般都是针对Cisco AutoQoS方式生成的命令进行性能调优 Legacy CLI Usage Guidelines Build a traffic policy:建立流量策略 Identify the traffic pattern.识别流量 Classify the traffic.分类流量 Prioritize the traffic.流量优先级的定义 Select a proper QoS mechanism:选择合适的QoS的机制: Queuing队列 Compression压缩 Apply the traffic policy to the interface.应用流量策略到接口 Legacy CLI Example For interactive traffic, CQ and TCP header compression can be used.针对交互式的流量,CQ(自定义队列)和TCP报头压缩被使用 Modular QoS CLI A command syntax for configuring QoS policy模块化QoS策略命令行配置 Reduces configuration steps and time节省时间提高效率 Configures policy, not “raw” per-interface commands策略的配置不是原始的基于每一个端口的命令 Uniform CLI across major Cisco IOS platforms在主要的Cisco IOS平台上的配置都是一致的 Uniform CLI structure for all QoS features针对所有的QoS的特性其命令行接口架构都具有一致性 Separates classification engine from the policy独立的流量分类引擎与策略定义相分离 Modular QoS CLI Components Modular QoS CLI Components Modular QoS CLI Components Class Maps “What traffic do we care about?”我们关心的是什么样的流量 Each class is identified using a class map.使用class map标识不同的流量类别. A traffic class contains three major elements:一个流量类别包含三个主要的元素: A case-sensitive name一个大小写敏感的名称 A series of match commands一系列的match命令 An instruction on how to evaluate the match commands if more than one match command exists in the traffic class Class Maps (Cont.) Class maps can operate in two modes:Class maps 能够工作于两种模式: Match all: All conditions have to succeed.Match all: 满足所有的条件. Match any: At least one condition must succeed.Match any: 至少有一个条件满足. The default mode is match all.默认模式是match all. Configuring Class Maps Enters class-m