TP-Link T1600G-18TS Jetstream Smart Switches User Guide - Page 541
QoS, Overview, Supported Features, Priority Mode: Three modes are supported, Port Priority
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Configuring QoS QoS 1 QoS 1.1 Overview With network scale expanding and applications developing, internet traffic is dramatically increased, thus resulting in network congestion, packet drops and long transmission delay. Typically, networks treat all traffic equally on FIFO (First In First Out) delivery basis, but nowadays many special applications like VoD, video conferences, VoIP, etc, require more bandwidth or shorter transmission delay to guarantee the performance. With QoS (Quality of Service) technology, you can classify and prioritize network traffic to provide differentiated services to certain types of traffic. 1.2 Supported Features You can configure the class of service, bandwidth control, Voice VLAN and Auto VoIP features on the switch to maximize the network performance and bandwidth utilization. Class of Service The switch classifies the ingress packets, maps the packets to different priority queues and then forwards the packets according to specified scheduler settings to implement QoS function. ■■ Priority Mode: Three modes are supported, Port Priority, 802.1p Priority and DSCP Priority. ■■ Scheduler Mode: Two scheduler types are supported, Strict and Weighted. Bandwidth Control Bandwidth Control functions to control the traffic rate and traffic threshold on each port to ensure network performance. ■■ Rate limit functions to limit the ingress/egress traffic rate on each port. In this way, the network bandwidth can be reasonably distributed and utilized. ■■ Storm Control function allows the switch to monitor broadcast packets, multicast packets and UL-frames (Unknown unicast frames) in the network. If the transmission rate of the packets exceeds the set rate, the packets will be automatically discarded to avoid network broadcast storm. Voice VLAN and Auto VoIP The voice VLAN and Auto VoIP features are used to prioritize the transmission of voice traffic. Voice traffic is typically more time-sensitive than data traffic, and the voice quality User Guide 516
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