Quality of service – Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) User Manual
Page 361
Switching Introduction
Software Reference for x310 Series Switches
C613-50046-01 REV A
AlliedWare Plus
TM
Operating System - Version 5.4.4C
14.19
Quality of Service
Quality of Service (QoS) enables you to both prioritize traffic and limit its available
bandwidth. The concept of QoS is a departure from the original networking protocols, in
which all traffic on the Internet or within a LAN had the same available bandwidth.
Without QoS, all traffic types are equally likely to be dropped if a link becomes
oversubscribed. This approach is now inadequate in many networks, because traffic levels
have increased and networks often carry time-critical applications such as streams of real-
time video data. QoS also enables service providers to easily supply different customers
with different amounts of bandwidth.
Configuring Quality of Service involves two separate stages:
1.
Classifying traffic into flows, according to a wide range of criteria. Classification is
performed by the switch’s class maps.
2.
Acting on these traffic flows.
For more information on QoS see
Chapter 38, Quality of Service (QoS) Introduction
and