2025年QoS技术白皮书-新华三

QoS 技术白皮书 Copyright © 2022 新华三技术有限公司 版权所有，保留一切权利。 非经本公司书面许可，任何单位和个人不得擅自摘抄、复制本文档内容的部分或全部，并不得以任何形式传播。 除新华三技术有限公司的商标外，本手册中出现的其它公司的商标、产品标识及商品名称，由各自权利人拥有。 本文中的内容为通用性技术信息，某些信息可能不适用于您所购买的产品。 i 目 录 1 概述·························································································································································· 1 1.1 产生背景 ··············································································································································· 1 1.2 技术优点 ··············································································································································· 1 1.3 QoS 服务模型简介 ································································································································ 1 1.3.1 Best-Effort 服务模型 ·················································································································· 1 1.3.2 IntServ 服务模型 ························································································································ 2 1.3.3 DiffServ 服务模型······················································································································· 2 1.3.4 IntServ 与 DiffServ 之间的互通 ·································································································· 3 2 IP QoS 技术实现 ······································································································································ 3 2.1 IP QoS 功能综述 ·································································································································· 3 2.2 流量分类和标记 ···································································································································· 4 2.2.1 IPv4 QoS 业务分类 ···················································································································· 5 2.2.2 IPv6 QoS 业务分类 ···················································································································· 6 2.2.3 以太网 QoS 业务分类 ················································································································ 6 2.3 拥塞管理 ··············································································································································· 8 2.3.1 先进先出队列（FIFO） ············································································································· 9 2.3.2 优先队列（PQ） ······················································································································ 10 2.3.3 定制队列（CQ）······················································································································ 11 2.3.4 加权公平队列（WFQ） ··········································································································· 12 2.3.5 基于类的加权公平队列（CBWFQ） ·····································