6.5 Class-of-Service (CoS) Support

The switch provides two transmit queues on each port, with a weighted fair queuing scheme. This function can be used to provide independent priorities for various types of data such as real-time video or voice, and best-effort data.

Priority assignment to a packet in this switch can be accomplished in any of the following ways:

•Priority can be explicitly assigned by end stations which have applications that require a higher priority than best-effort. This switch utilizes the IEEE 802.1p and 802.1Q tag structure to decide priority assignments for the received packets.

•A port may be manually configured as high priority. In this case, when any other port receives traffic from a high-priority port, that traffic is automatically placed in the high-priority output queue.

WGS3 Layer 3 Switch User’s Manual

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