Cisco SRW224G4P User Guide - Page 53
Queue Settings, CoS to Queue
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24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet Queue Settings This switch prioritizes each packet based on the required level of service, using four priority queues with strict or Weighted Round Robin Queuing. It uses IEEE 802.1p and 802.1Q tags to prioritize incoming traffic based on input from the end-station application. These functions can be used to provide independent priorities for delaysensitive data and best-effort data. Queue Mode (Global). You can set the switch to service the queues based on a strict rule that requires all traffic in a higher priority queue to be processed before lower priority queues are serviced, or use Weighted RoundRobin (WRR) queuing that specifies a relative weight of each queue. WRR uses a predefined relative weight for each queue that determines the percentage of service time the switch services each queue before moving on to the next queue. This prevents the head-of-line blocking that can occur with strict priority queuing. • WRR. Weighted Round-Robin shares bandwidth at the egress ports by using scheduling weights 1, 2, 4, 6 for queues 0 through 3 respectively. • Strict. Services the egress queues in sequential order, transmitting all traffic in the higher priority queues before servicing lower priority queues. Set the Queue Mode to Strict or WRR using the Queue Mode drop-down menu then click submit. Enter a weight, select a traffic class (that is, output queue) then click submit to save the changes. Weight Value. Set a new weight for the selected traffic class. However, note that Queue 0 is fixed at a weight of 1, and cannot be configured. (Range: 1-31) CoS to Queue Class of Service. CoS value. (Range: 0-7, where 7 is the highest priority) Queue. Output queue buffer. (Range: 0-3, where 3 is the highest CoS priority queue) Assign priorities to the traffic classes (that is, output queues) for the selected interface. Click submit to save the changes. Chapter 5: Configuring the Switch through the Web Utility QoS Figure 5-26: QoS - Queue Settings Figure 5-27: QoS - CoS to Queue 45