Allen-Bradley 1783-WAPAK9, User Manual

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460 Rockwell Automation Publication 1783-UM006A-EN-P - May 2014
Chapter 16 Configuring QoS
Configure QoS by Using
Straitx 5100 Device Manager These steps describe how to configure quality of service (QoS) on your access
point. With this feature, you can provide preferential treatment to certain traffic
at the expense of others. Without QoS, the access point offers best-effort service
to each packet, regardless of the packet contents or size.
Typically, networks operate on a best-effort delivery basis, that means all traffic
has equal priority and an equal chance of being delivered in a timely manner.
When congestion occurs, all traffic has an equal chance of being dropped.
When you configure QoS on the access point, you can choose specific network
traffic, prioritize it according to its relative importance, and use congestion-
management and congestion-avoidance techniques to provide preferential
treatment. Implementing QoS in your wireless LAN makes network performance
more predictable and bandwidth utilization more effective.
When you configure QoS, you create QoS policies and apply the policies to the
VLANs configured on your access point. If you do not use VLANs on your
network, you can apply your QoS policies to the access point's Ethernet and radio
ports.
QoS is disabled by default. Before configuring QoS on your access point, keep
this information in mind:
•
The most important guideline in QoS deployment is to be familiar with
the traffic on your wireless LAN. If you know the applications used by
wireless client devices, the applications' sensitivity to delay, and the amount
of traffic associated with the applications, you can configure QoS to
improve performance.
•
QoS does not create additional bandwidth for your wireless LAN; it helps
control the allocation of bandwidth. If you have plenty of bandwidth on
your wireless LAN, you might not need to configure QoS.
IMPORTANT
If you use VLANs on your wireless LAN, make sure the necessary VLANs are
configured on your access point before configuring QoS.