SMC Networks SMC7724M/VSW Mapping Priority Classes to Egress Queues, Priority Level Traffic Type

CLASS OF SERVICE CONFIGURATION

Mapping Priority Classes to Egress Queues

This switch supports Class of Service by using four priority queues, with Weighted Round Robin Queuing for each port. Eight traffic classes are defined in IEEE 802.1p. The default priority levels are assigned according to recommendations in the IEEE 802.1p standard as shown in the following table.

Priority	Queue
0	1
1	0
2	0
3	1
4	2
5	2
6	3
7	3

The priority levels recommended in the IEEE 802.1p standard for various network applications are shown in the following table. However, you can map the priority levels to the switch’s output queues in any way that benefits application traffic for your own network.

Note that the mapping of CoS priorities to switch output queues for any single port then applies to all ports on the switch.

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

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