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DES-3200-10/18/28/28F Layer 2 Ethernet Managed Switch User Manual
Section 4
QoS
Bandwidth Control
Traffic Control
802.1p Default Priority
802.1p User Priority
QoS Scheduling Settings
Priority Mapping
TOS Mapping
DSCP Map Settings
The Switch supports 802.1p priority queuing Quality of Service. The following section discusses the implementation of
QoS (Quality of Service) and benefits of using 802.1p priority queuing.
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 amount of 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
larger bandwidth be created, but other less critical traffic can be limited, so excessive bandwidth can be saved. The
Switch has separate hardware queues on every physical port to which packets from various applications can be
mapped to, and, in turn prioritized. View the following map to see how the Switch implements 802.1P priority queuing.
Figure 4 - 1. Mapping QoS on the Switch
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