H3C S3100-52P Operation Manual page 545

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Operation Manual – QoS-QoS Profile

H3C S3100-52P Ethernet Switch

Assured forwarding (AF) class: This class is further divided into four subclasses

(AF1/2/3/4) and a subclass is further divided into three drop priorities, so the AF

service level can be segmented. The QoS rank of the AF class is lower than that of

the EF class;

Class selector (CS) class: This class comes from the IP ToS field and includes

eight subclasses;

Best Effort (BE) class: This class is a special class without any assurance in the

CS class. The AF class can be degraded to the BE class if it exceeds the limit.

Current IP network traffic belongs to this class by default.

Table 1-3 Description on DSCP precedence values

DSCP value (decimal)

DSCP value (binary)

Chapter 1 QoS Configuration

be (default)

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