H3C WX Series Configuration Manual

Also see for WX Series: Configuration guide Getting started guide Command reference Command reference Registration and activation guide

Contents

H3C WX Series Configuration Manual Manual pdf 35 page image

354 Priority mapping configurationPriority mapping overviewWhen a packet arrives, an AC assigns a set of QoS priority parameters to the packetbased on a certain priority field carried in the packet or the port priority of the incomingport depending on your configuration. This process is called priority mapping. The set ofQoS priority parameters decides the scheduling priority and forwarding priority of thepacket.Priority mapping is implemented with priority mapping tables and involves prioritiesincluding 802.11e priority, 802.1p priority, DSCP, and local precedence on the H3C WXseries access controllers.Local precedence is assigned by the AC and is of only local significance. Localprecedence is used for queuing. A local precedence value corresponds to an outputqueue. A packet with higher local precedence is assigned to a higher priority outputqueue to be preferentially scheduled.Priority mapping tablesThe AC provides various priority mapping tables, or rather, priority mappings. By lookingup a priority mapping table, the AC decides which priority value is to assign to a packetfor subsequent packet processing.The default priority mapping tables are available for priority mapping. They are sufficientin most cases. If a default priority mapping table cannot meet your requirements, youcan modify the priority mapping table as needed.NOTE:For the default dot11e-lp priority mapping table, an input value yields a target value that is equalto it.The default priority mapping tables are as follows: