This section provides the DSCP and precedence values used in QoS class maps and policy maps. Unless noted as a restriction, you can mark both incoming and outgoing packets. Table 6-1 lists the commonly used DSCP values described in RFC 2475. Table 6-2 lists the RFC 791 precedence values from least to most important.

DSCP values can be used to provide different levels of service to network traffic. TOS (Type of Service) : Originally defined in the IP header to specify the priority and request a route for high throughput, low delay, and high reliability.

2022年4月19日 · DSCP Marking is a CLI-controlled feature, which enables to create and map 5QI and ARP values to enforceable QoS parameters. The SMF sends the configured DSCP value to the UPF. Then, the UPF applies the DSCP marking on the uplink and downlink packets based on the 5QI and ARP.

2024年9月5日 · This document describes how to set the Differentiated Services Code Point (DSCP) values in Quality of Service (QoS) configurations on a Cisco router. You must be familiar with the fields in the IP header and Cisco IOS ® CLI. This document is not restricted to specific software and hardware versions.

display qos map-table 命令用来查看当前的各优先级间的映射关系。 display qos map-table [ dscp-dot1p | dscp-dp | dscp-dscp ] 指定映射表名称，即查看从DSCP到802.1p优先级的映射关系。 指定映射表名称，即查看从DSCP到丢弃优先级的映射关系。 指定映射表名称，即查看从DSCP到DSCP的映射关系。 用户在配置各优先级之间的映射关系前使用 display qos map-table 命令，可以查看到当前优先级映射关系是否满足要求。 配置完成后可以通过此命令检查配置是否正确。 # …

The following table lists the DSCP mapping between DSCP names and DSCP values (decimal, hexadecimal, and binary), and labels.

Table 1 shows the mapping of DiffServ service class meanings (aliases) to DSCPs.

CoS to DSCP mapping can be configured using the mls qos commands. The CoS values range from 0 to 7, and the DSCP values can range from 0 to 63. Here's a simple example of a CoS to DSCP mapping configuration: In the above configuration: To verify your mapping, you can use the show mls qos maps command:

Using Differentiated Services Codepoint (DSCP) mapping. The DSCP Policy Table associates an 802.1p priority with a DSCP codepoint in an IPv4/IPv6 packet. Using DSCP codepoints in your network allows you to set a LAN policy that operates independently of 802.1Q VLAN-tagging.

display qos map-table 命令用来查看当前的各优先级间的映射关系。 display qos map-table [ dscp-dot1p | dscp-dp | dscp-dscp | ip-pre-dot1p | ip-pre-ip-pre ] 指定映射表名称，即查看从DSCP到802.1p优先级的映射关系。 指定映射表名称，即查看从DSCP到丢弃优先级的映射关系。 指定映射表名称，即查看从DSCP到DSCP的映射关系。 指定映射表名称，即查看从IP优先级到802.1p优先级的映射关系。 指定映射表名称，即查看从IP优先级到IP优先级的映射关系。