Asus GigaX1024iPlus - Manual (Page 50)

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Chapter 4 - Configuration Management
ASUS GigaX 1024i+
4.6.4 CoS
The switch supports 4 egress
queues for each port. You can
specify the scheduling types as
follows:
•
Strict priority scheduling: Each
CoS value can map into one of
the four queues. The queue 4 has
the highest priority to transmit the
packets. The packets in the low
priority queue do not transmit until all the high priority queues become
empty. In Strict priority scheduling, weight setting is always zero.
•
Weighted round-robin (WRR) scheduling: WRR scheduling requires
you to specify a number to indicate the importance (or weight) of the
queue relative to the other CoS queues. WRR scheduling prevents the
low priority queues from being completely neglected during periods of
high priority traffic. WRR scheduling transmits some packets from each
queue in turn. The number of packets it sends corresponds to the relative
importance of the queue. For example, if Queue 1 has a weight of 1 and
Queue 2 has a weight of 2, one packet is sent from Queue 1 for every two
that are sent from Queue 2. By using this scheduling, low priority queues
have the opportunity to send packets even though the high priority queues
are not empty. The fixed weights are 1, 2, 4, 8.
Click <
OK> to send the settings to the switch via the HTTP server. Click
< Reload> to refresh the settings. To permanently save the configuration,
go to the Save Configuration page, then click <Save>.
Figure 44. CoS