
Priority Level:  Indicates the priority level the packets with tag are mapped to. The 
priority levels are labeled as TC0, TC1, TC2 and TC3. 
Note: 
To complete QoS function configuration, you have to go to the Schedule Mode page to select a 
schedule mode after the configuration is finished on this page. 
Configuration Procedure: 
Step  Operation  Description 
1  Configure the mapping 
relation between the DSCP 
priority and TC 
Required. On QoS→DiffServ→DSCP Priority page, 
enable DSCP Priority and configure the mapping 
relation between the DSCP priority and TC. 
2  Select a schedule mode  Required.  On  QoS→DiffServ→Schedule Mode 
page, select a schedule mode. 
9.2  Bandwidth Control Bandwidth function, allowing you to control the traffic rate and broadcast flow on each port to 
ensure network in working order, can be implemented on Rate Limit and Storm Control pages. 
9.2.1 Rate Limit
Rate limit functions to control the ingress/egress traffic rate on each port via configuring the 
available bandwidth of each port. In this way, the network bandwidth can be reasonably distributed 
and utilized.  
Choose the menu QoS→Bandwidth Control→Rate Limit to load the following page. 
Figure 9-10 Rate Limit 
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