Cabletron Systems SSR-GLX19-02, User Manual

Page: 179 / 495

CoreWatch User’s Manual 179
Chapter 12
Configuring QoS
on the SSR
After you define interfaces on the SSR, you can configure QoS policies to control traffic.
This chapter
• provides an overview of QoS.
• lists the order in which you perform the various QoS-configuration tasks.
• discusses establishing the SSR’s queuing policy.
• explains how to associate precedences with IP and IPX flows.
• discusses configuring QoS policies to define flows.
• provides details about modifying existing QoS profiles.
What Is QoS?
On the SSR, QoS is a set of parameters that let you do the following:
• Establish a queuing policy on the SSR to prioritize the SSR’s traffic.
• Associate a precedence with Layer-3/Layer-4 flows. You do so by assigning a
precedence value to each field in those type of flows. The SSR uses the precedence
value assigned to the fields to break ties if packets match more than one flow.
• Classify Layer-2, Layer-3, and Layer-4 network traffic into one of the following
priorities:
– control
– high