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Advanced Configuration Options 52
Model 2160 Series Getting Started Guide 4 • Web configuration
In the Scheduling Configuration table, you can set up the type of QoS operation from 1 to 3. You can also set
up the Queue Weight from 1 to 15.
WRR Scheduling Configuration Example. For example, you
can set the Model 2160 use Weighted Round-Robin (WRR) queu-
ing that specifies a relative weight of each queue. WRR uses a pre-
defined relative weight for each queue that determines the
percentage of service time to services each queue before moving on
to the next queue. This prevents the head-of-line blocking that can
occur with strict priority queuing.
For this example, set up the WRR (Type 1) to share bandwidth by using scheduling weights 1, 2, 4 and 8 for
queues 0 through 3 respectively.
According to above two tables, we can get the mapping QoS values to Egress Queues as the following:ely.
Table 9. VLAN Tag Priority Levels
Priority Level Traffic Type
0 (default) Best Effort
1 Background
2 Spare
3 Excellent Effort
4 Controlled Load
5 Video, less than 100 milliseconds latency and jitter
6 Voice, less than 10 milliseconds latency and jitter
7 Network Control
Table 10. WRR Scheduling Configuration Example Values
Queue 0 1 2 3
Type 1
WRR WRR WRR WRR
Weight
1 2 4 8
Priority
0 1 2 3 4 5 6 7
Queue
1 0 0 1 2 2 3 3
Priority
0 1 2 3
Queue
1,2 0,3 4,5 6,7