PLANET FGSW-2840 - Manual (Page 159)

User’s Manual of FGSW-2840 / FGSW-4840S
4.7 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.
QoS
This Managed Switch classifies the ingress packets, maps the packets to different priority queues and then forwards the packets
according to specified scheduling algorithms to implement QoS function. The screen in
Figure 4-7-1 appears.
Figure 4-7-1 : QoS Function
 Traffic classification: Identifies packets conforming to certain characters according to certain rules.
 Map: The user can map the ingress packets to different priority queues based on the priority modes. This Managed Switch
implements three priority modes based on port, on 802.1P and on DSCP.
 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. The Managed Switch supports four schedule modes: SP, WRR,
SP+WRR and Equ.
Priority Mode
This Managed Switch implements three priority modes based on port, on 802.1P and on DSCP. By default, the priority mode based
on port is enabled and the other two modes are optional.
1. Port Priority
Port priority is a priority level of the port. After port priority is configured, the data stream will be mapped to the egress queues directly
according to the priority level of the port.
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