Allied-telesis AT-S63 Manual de usuario Pagina 186

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Chapter 14: Class of Service
186 Section II: Advanced Operations
Configuring Egress Scheduling
This procedure explains how to select and configure a scheduling method
for Class of Service. Scheduling determines the order in which the ports
handle packets in their egress queues. For an explanation of the two
scheduling methods, refer to Chapter 16, “Class of Service,” in the AT-S63
Management Software Menus Interface User’s Guide. Scheduling is set at
the switch level. You cannot set this at the port level.
To change scheduling, perform the following procedure:
1. From the home page, select Configuration.
The System page is displayed with the General tab selected by
default, as shown in Figure 5 on page 38.
2. From the Configuration menu, select the Services option.
The Services page is displayed with the CoS tab selected by default,
as shown in Figure 59 on page 182.
3. Select the Queuing & Scheduling tab.
The Queuing & Scheduling tab is shown in Figure 61 on page 184.
Note
The Configure CoS Queues to Egress Queues section in the tab is
explained in the previous procedure “Mapping CoS Priorities to
Egress Queues” on page 184.
4. To select a scheduling method, click either Strict Priority or
Weighted Priority in the Configure Egress Weights section of the tab.
The default is Strict Priority.
Skip the next step if you select Strict Priority. Queue weights do not
apply to Strict Priority scheduling.
5. If you selected Weighted Priority, use the Queue # Weight fields to
specify for each queue the number of packets you want a port to
transmit before it goes to the next queue. The range is 1 to 15. For an
example, refer to Table 5.
Table 5. Example of Weighted Round Robin Priority
Port Egress Queue Maximum Number of Packets
Q0 1
Q1 1
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