3com 8807 User Guide

C

HAPTER

 22: Q

O

S C

ONFIGURATION

By default, the switch obtains local precedence and drop precedence according to 
the default mapping values.

Perform the following configurations in Ethernet port view.

Perform the following configuration in port group view.

Traffic policing refers to rate limit based on traffic. If the traffic threshold is 
exceeded, corresponding measures will be taken, for example, dropping the 
excessive packets or re-defining their priority levels.

In the traffic supervision action, the switch uses the service parameters allocated 
according to the DSCP + Conform-Level -> Service parameter mapping table and 
the EXP + Conform-Level -> Service parameter mapping table and the 802.1p 
priority values allocated according to the Local-precedence+Conform-Level -> 
802.1p priority mapping table. So you should configure these three mapping 
tables or use their default values.

Perform the following configurations in the specified views.

Configure the CoS -> Local-precedence 
mapping table 

qos cos-local-precedence-map 
cos0-map-local-prec cos1-map-local-prec 
cos2-map-local-prec cos3-map-local-prec 
cos4-map-local-prec cos5-map-local-prec 
cos6-map-local-prec cos7-map-local-prec 

Restore the default values of CoS -> 
Local-precedence mapping table 

undo qos cos-local-precedence-map

Table 160   Configure default local precedence for port

Configure default local precedence for a port  priority priority-level 

Restore the default local precedence for a port  undo priority

Table 161   Configure priority for the port group

Configure local priority for the port group 

priority { priority-level | trust } 

Restore the local priority of the port group to 
the default value 

Table 159   Configure mapping tables

Table 162   Configure mapping table

Enter conform level view (System view) 

qos conform-level conform-level-value 

Configure the DSCP + Conform-Level -> 
Service parameters mapping table (conform 
level view) 

dscp dscp-list : dscp-value exp-value cos-value 
local-precedence-value drop-precedence