802.1P And Qos - D-Link 1016T - DGS Switch User Manual

802.1P and QoS

The DGS-1024T and DGS-1016T Switches support 802.1p priority queuing
Quality of Service. The imp lementation of QoS (Quality of Service) and
benefits of using 802.1p priority queuing are described here.
Advantages of QoS
QoS is an implementation of the IEEE 802.1p standard that allows network
administrators a method of reserving bandwidth for important functions that
require a large bandwidth or have a high priority, such as VoIP (voice-over
Internet Protocol), web browsing applications, file server applications or video
conferencing. Not only can a larger bandwidth be created, but other less
critical traffic can be limited, so bandwidth can be saved. The Switch has
separate hardware queues on every physical port to which packets fro m
various applications are mapped to and assigned a priority. The illustration
below shows how 802.1P priority queuing is implemented on the Switch. The
eight IEEE 802.1P priority levels defined by the standard are mapped to the
four class queues used in the Switch.
The picture above shows the default priority setting for the Switch. Class-3 has
the highest priority of the four priority queues on the Switch. In order to
implement QoS, the user is required to instruct the Switch to examine the
Mapping QoS on the Switch
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