LevelOne GSW-2473, User Manual

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Class of Service Configuration
Class of Service (CoS) is a 3-bit field within a layer two Ethernet frame header
using IEEE 802.1Q. Class of Service (CoS) is a way of managing traffic in a
network by grouping similar types of traffic (for example, e-mail, streaming video,
voice, large document file transfer) together and treating each type as a class with
its own level of service priority. Unlike Quality of Service (QoS) traffic
management, Class of Service technologies do not guarantee a level of service in
terms of bandwidth and delivery time; they offer a "best-effort."
„
Enable High Priority: When this check box is ticked, the packets passing
through the following ports will be serviced in accordance with the mode of
Port-based or VLAN Tag-based.
„
Port No: The label of each port.
„
Port Base: Tick this check box to apply the priority rule to the packets
passing through the ticked ports.
„
VLAN Tag: Tick this check box to apply the priority rule to the packets
passing the ticked ports by checking the 3-bit field within the frame header.
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