Allied Telesis AT-8000S 사용자 설명서

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This section describes Quality of Service related configurations.

After packets are assigned to a specific egress queue, Class of Service (CoS) services can be assigned to the 
queue. Egress queues are configured with a scheduling scheme by one of the following methods:

Strict Priority — Ensures that time-sensitive applications are always forwarded. Strict Priority (SP) allows 

the prioritization of mission-critical, time-sensitive traffic over less time-sensitive applications.For example, 
under SP, voice over IP (VoIP) traffic can be prioritized so that it is forwarded before FTP or e-mail (SMTP) 
traffic.

Weighted Round Robin — Ensures that a single application does not dominate the device forwarding 

capacity. Weighted Round Robin (WRR) forwards entire queues in a round robin order. All queues can 
participate in WRR, except SP queues. SP queues are serviced before WRR queues. If the traffic flow is 
minimal, and SP queues do not occupy the whole bandwidth allocated to a port, the WRR queues can share 
the bandwidth with the SP queues. This ensures that the remaining bandwidth is distributed according to the 
weight ratio. If WRR is selected, the following weights are assigned to the queues: 1, 2, 4, 8.

This section contains the following topics:

Mapping CoS to Queue

Mapping DSCP to Queue