SMC Networks SMC6709L2 manual Class of Service Configuration

CONFIGURING THE SWITCH

Class of Service Configuration

Class of Service (CoS) allows you to specify which data packets have greater precedence when traffic is buffered in the switch due to congestion. This switch supports CoS with two priority queues for each port. Data packets in a port’s high-priority queue are transmitted before those in the lower-priority queue.

You can set the method used to process priority traffic (i.e., first-in first-out, all high before low, or weighted round-robin), and also map the frame priority tags (i.e., 0 - 7) to the high or low priority queues.

Field Attributes

•First Come First Served – Packets are processed first-in first-out.

•All High before Low – All packets in the high-priority queue are processed before any packets in the low-priority queue.

•Weighted Round Robin – Sets the preference given to packets in the high-priority queue. This specifies the number of high-priority packets sent before one low-priority packet is sent. (Range: 1-7; Default: 2)

•Enable Delay Bound – Limits the queuing time for low-priority packets. Any low-priority packets that exceed the delay bound will be sent. Note that the “Max bridge transmit delay bound control” must be enabled (page 3-6)for the Enable Delay Bound to function.

(Range: 0-255 ms; Default: 0 ms)

•QoS Policy (High Priority Levels) – The default priority levels are assigned according to recommendations in the IEEE 802.1p standard. However, you can map the priority levels to the switch’s output queues in any way that benefits application traffic for your own network. (Range: Level 0 - 7; Default: Level 4 - 7)

Web – Click Administrator=>Switch Settings=>Advanced. Select the priority method (First Come First Serve, All High before Low, or WRR), set the high-priority queue weight preference when using WRR, set a delay

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