3Com 3500 - Manual (Page 689)

22
Q
UALITY OF
S
ERVICE
(Q
O
S)
AND
RSVP
Quality of Service (QoS) and the Resource Reservation Protocol (RSVP) are
advanced features that provide policy-based services. Policy-based
services establish various grades of network services to accommodate the
needs of different types of traffic (for example, multimedia, video, and file
backups). QoS software relies on RSVP to provide admission control.
This chapter provides guidelines and other key information about how to
configure QoS and RSVP in your system.
QoS and RSVP features include classifiers, controls, and RSVP parameters.
Configure these features in the following order:
1 You first enter the command qos
2 to define how the system groups packets so that it can schedule them
with the appropriate service level.
3 You then enter the command qos control define to assign rate
limits and priorities to the packets that are associated with one or more of
your classifiers. A classifier has no effect until you associate it with a
control.
The system provides predefined classifiers and controls that are suitable
for many configurations, or you can define your own classifiers, apply
controls to the classifiers, and then decide whether to use RSVP. For more
information about QoS and RSVP, see the Implementation Guide for your
system.
For the CoreBuilder ® 9000, the commands in this chapter apply only to
Layer 3 switching modules.