User's Manual

User’s Manual of SGS-5240 Series Managed Switch
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4.6 Qu’s
4.6.1 Egress Queue
Qu’s > Egress Queue page is used to set the queue mode for the egress queues on any interface. The switch can be set to
service the queues based on a strict rule that requires all traffic in a higher priority queue to be processed before the lower
priority queues are serviced, or Weighted Round-Robin (WRR) queuing which specifies a scheduling weight for each queue. It
can also be configured to use a combination of strict and weighted queuing.
◆Queue Mode
 Strict – Services the egress queues in sequential order, transmitting all traffic in the higher priority queues before
servicing lower priority queues. This ensures that the highest priority packets are always serviced first, ahead of all
other traffic.
 WRR – Weighted Round-Robin shares bandwidth at the egress ports by using scheduling weights, and servicing
each queue in a round-robin fashion. (This is the default setting.)
 Strict and WRR – Uses strict priority on the high-priority queues and WRR on the remaining queues.
◆Queue ID – The ID of the priority queue. (Range: 0-7)
◆Strict Mode – If “Strict and WRR” mode is selected, then a combination of strict services is used for the high priority queues
and weighted service for the remaining queues. Use this parameter to specify the queues assigned to use strict priority. (Default:
Disabled)
◆Weight – Sets a weight for each queue which is used by the WRR scheduler. (Range: 1-255; Default: Weights 1, 2, 4, 6, 8, 10,
12 and 14are assigned to queues 0 - 7 respectively)