Westell Inc. ULS3-C Manual De Usuario

 

 
03/24/09 - DRAFT 
 
 

030-300554 Rev. C 

162 

    March 2009 

 

 
If you clicked New Entry, the following screen appears. Select a device from the Device drop-down list. Then, click 
OK to continue. 
 

 

 
After you have selected a device and clicked OK in the preceding screen, the following screen appears. Enter the 
bandwidth values for transmit (Tx) and receive (Rx), and then select the desired option from the TCP Serialization 
drop-down list. Next, click the desired New Entry link to add a class. 
 

 

 
Tx Traffic Shaping 
 
The bandwidth of a device can be divided in order to reserve constant portions of bandwidth to predefined 
traffic types. Such a portion is known as a Shaping Class. When not used by its predefined traffic type, or 
owner (for example VoIP), the class will be available to all other traffic. However when needed, the entire 
class is reserved solely for its owner. Moreover, you can limit the maximum bandwidth that a class can use 
even if the entire bandwidth is available. Configure the following fields: 
 
Tx Bandwidth  
 
This parameter limits the gateway's bandwidth transmission rate. The purpose is to limit the bandwidth of the WAN 
device to that of the weakest outbound link, for instance, the DSL speed provided by the ISP. This forces the router 
to be the network bottleneck, where sophisticated QoS prioritization can be performed. If the device's bandwidth is 
not limited correctly, the bottleneck will be in an unknown router or modem on the network path, rendering this 
router’s QoS useless.