SMC Networks TIGERSWITCH SMC6752AL2 Manual De Usuario

3-174

CLI – The following example shows how to assign WRR weights to each 
of the priority queues.

This switch supports several common methods of prioritizing layer 3/4 
traffic to meet application requirements. Traffic priorities can be specified 
in the IP header of a frame, using the priority bits in the Type of Service 
(ToS) octet or the number of the TCP port. If priority bits are used, the 
ToS octet may contain three bits for IP Precedence or six bits for 
Differentiated Services Code Point (DSCP) service. When these services 
are enabled, the priorities are mapped to a Class of Service value by the 
switch, and the traffic then sent to the corresponding output queue. 

Because different priority information may be contained in the traffic, this 
switch maps priority values to the output queues in the following manner:

•

The precedence for priority mapping is IP Port Priority, IP Precedence 
or DSCP Priority, and then Default Port Priority. 

•

IP Precedence and DSCP Priority cannot both be enabled. Enabling 
one of these priority types will automatically disable the other. 

Console(config)#queue bandwidth 6 9 12 

Console(config)#exit
Console#show queue bandwidth

Queue ID  Weight
 --------  ------
    0        1
    1        6
    2        9
    3        12
Console