S
UMMIT
S
WITCH
I
NSTALLATION
AND
U
SER
G
UIDE
8-1
8
Quality of Service (QoS)
This chapter describes the concept of Quality of Service (QoS) and explains how to
implement QoS on the Summit.
O
VERVIEW
OF
Q
UALITY
OF
S
ERVICE
QoS is a feature of the Summit that allows you to specify different service levels for
outbound trafÞc. QoS is an effective control mechanism for networks that have
heterogeneous trafÞc patterns. Using QoS, you can specify the service that a trafÞc type
receives.
The main beneÞt of QoS is that it allows you to have control over the types of trafÞc
that receive priority service from the Switch. For example, if video trafÞc requires a
higher priority than data trafÞc, using QoS you can assign a different QoS proÞle to
those VLANs that are transmitting video trafÞc.
B
UILDING
B
LOCKS
Quality of Service is determined by one or more of the following building blocks:
¥ QoS mode
Ñ Indicates whether the Switch should use implicit or explicit trafÞc
classiÞcations. Implicit is the default.
¥ QoS proÞle
Ñ Includes bandwidth and priority parameters.
¥ TrafÞc classiÞcation
Ñ Fall into two major groups, those deÞned implicitly by virtue
of their association and those containing some explicit QoS information.
SUMMIT.BK Page 1 Thursday, September 25, 1997 12:33 PM
