Allied Telesis Switch AT-S110 Uživatelský manuál stáhnout pdf (Strana 179)

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AT-GS950/10PS Switch Web Interface User’s Guide

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The problem with this method is that some low priority packets might never

be transmitted from the switch because the algorithm might never have

time to process the packets waiting in the lower priority queues.

Weighted Round Robin Priority Scheduling

The weighted round robin (WRR) scheduling method functions as its name

implies. The port transmits a set number of packets from each queue, in a

round robin fashion, so that each has a chance to transmit traffic.Normally,

the higher the queue’s priority the more packets are transmitted in as the

algorithm cycles through the queues in turn. This method guarantees that

every queue receives some attention from the port for transmitting

packets.

Table 5 shows the WRR settings for the number of packets transmitted

from each queue. These values are permanent and you cannot be change

these values.

Table 5. Example of Weighted Round Robin Priority

Port Egress Queue

Maximum Number of

Packets

Q3 8

Q2 4

Q1 2

Q0 1

1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 385 386

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