PrefaceThe H3C S7500E documentation set includes 12 configuration guides, which describe the softwarefeatures for the H3C S7500E Series Ethernet Switches and guide you through the softwareconfiguration procedures. These configuration guides also provide configuration examples to help youapply software features to different network scenarios.The ACL and QoS Configuration Guide describes fundamentals and configuration of ACL and QoS. Itdescribes how to create IPv4 ACL and IPv6 ACL, use QoS polices to control traffic, and configurecommon QoS techniques such as traffic policing, traffic shaping, congestion management, andcongestion avoidance.This preface includes:z Audiencez Document Organizationz Conventionsz About the H3C S7500E Documentation Setz Obtaining Documentationz Documentation FeedbackAudienceThis documentation is intended for:z Network plannersz Field technical support and servicing engineersz Network administrators working with the S7500E seriesDocument OrganizationThe ACL and QoS Configuration Guide comprises these parts:ACL Configuration QoS Overview QoS ConfigurationApproachesPriority MappingConfigurationTraffic Policing, TrafficShaping, and Line RateConfigurationCongestion ManagementConfiguration Congestion Avoidance Traffic FilteringConfigurationPriority MarkingConfigurationTraffic RedirectingConfigurationAggregation CARConfigurationClass-Based AccountingConfigurationQoS in an EPON System Appendix A DefaultPriority Mapping TablesAppendix B Introductionto Packet Precedences