Technical information

Watson SHDSL Router
Web-based Management Manual
Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
8-48
Revision: 2012-02-29
2. Back in the 'Edit Device Traffic Shaping' screen, click the class name to edit the
shaping class. Alternatively, click its action icon . The 'Edit Shaping Class'
screen appears.
Figure 8-49: Edit Shaping Class
Configure the following fields:
Name The name of the class.
Class Priority The class can be granted one of eight priority levels, zero be-
ing the highest and seven the lowest (note the obversion when compared to the
rules priority levels). This level sets the priority of a class in comparison to other
classes on the device.
Bandwidth The reserved transmission bandwidth in kilo-bits per second.
You can limit the maximum allowed bandwidth by selecting the 'Specify' option in
the drop-down menu. The screen will refresh, adding another Kbits/s field.
Figure 8-50: Specify Maximum Bandwidth
Policy The class policy determines the policy of routing packets inside the
class. Select one of the four options:
 Priority Priority queuing utilizes multiple queues, so that traffic is dis-
tributed among queues based on priority. This priority is defined according to
packet's priority, which can be defined explicitly, by a DSCP value (refer to Sec-
tion 8.3.5), or by a 802.1p value (refer to Section 8.3.6).
 FIFO The "First In, First Out" priority queue. This queue ignores any
previously-marked priority that packets may have.
 Fairness The fairness algorithm ensures no starvation by granting all
packets a certain level of priority.
 RED The Random Early Detection algorithm utilizes statistical
methods to drop packets in a "probabilistic" way before queues overflow. Drop-
ping packets in this way slows a source down enough to keep the queue
steady and reduces the number of packets that would be lost when a queue
overflows and a host is transmitting at a high rate.
 WRR Weighted Round Robin utilizes a process scheduling function
that prioritizes traffic according to the pre-defined 'Weight' parameter of a traf-