Manual TP-LINK TL-SG1024DE (page 34 of 43) (English)

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Chapter 6 QoS

QoS (Quality of Service) functions to provide different quality of service for various network

applications and requirements and optimize the bandwidth resource distribution so as to provide a

network service experience of a better quality.

¾ QoS

This switch classifies the ingress packets, maps the packets to four different priority queues and

then forwards the packets according to Strict-Priority scheduling algorithms to implement QoS

function.

Figure 6-1 QoS function

z Traffic classification: Identifies packets conforming to certain characters according to certain

rules.

z Map: This switch supports four priority queues. The priority queues are labeled as 1(Lowest),

2(Normal), 3(Medium) and 4(Highest), among them the bigger the value, the higher the

priority. The ingress packets are mapped to four different priority queues based on the QoS

modes. This switch implements two QoS modes based on port and on 802.1P.

z Queue scheduling algorithm: When the network is congested, the problem that many packets

compete for resources must be solved, usually in the way of queue scheduling. In both

port-based and 802.1P QoS modes, this switch adopts Strict-Priority scheduling algorithm. In

Strict-Priority scheduling algorithm, the queue with higher priority will occupy the whole

bandwidth. Packets in the queue with lower priority are sent only when the queue with higher

priority is empty.

¾ QoS Mode

This switch implements two QoS modes based on port and on 802.1P. By default, the QoS mode

based on port is enabled and the other one is optional.

1. Port Based

When port-base QoS mode is enabled, the user can manually map the ingress packets of the port

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TP-LINK TL-SG1024DE Manual

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