Nortel business policy switch 2000, User Manual

Page: 334 / 412

334 Chapter 5 Sample QoS configuration
208700-C
Configuring shapers
Shaping operates at egress and specifies the maximum rate at which traffic will be
transmitted over a given time. Traffic is allowed to exceed this rate in short bursts.
You specify a burst size to indicate the maximum burst size of traffic allowed to
egress without a shaping delay.
Traffic that is being shaped may need to be buffered temporarily to conform to the
specified flows. You can choose whether 1, 2, 4, 8, or 16 packets can be held in the
shaping queue for each policy. Some packets may be dropped if buffers are
completely used.
You can shape either metered data or no metered data. Also, you do not have to
shape the traffic.
Shapers are not modifiable. If you want to change a shaper, you must delete the
entry in the Shaper Table and reenter the information.
To configure a shaper:
1 Click the Application > QoS > QoS Advanced > Shapers menu option.
The Shapers page opens ( Figure 123 ).
Note: To use the QoS shaping feature, you must install the BPS
2000-1GT, BPS 2000-2GT, or BPS 2000-2GE MDA in a Business
Policy Switch.
Note: If you do not want to shape the traffic, skip to “Configuring
policies” on page 336 .