ATL Telecom R1-SW Ethernet Switch - Manual (Page 170)

R1-SW24L2B User’s Manual
9-2
QoS Overview
This section describes QoS (Quality of Service) and QoS features supported by the Corecess R1-
SW24L2B.
QoS (Quality of Service)
QoS can classify traffic into several levels and provide graded quality of service. QoS function
can give high priority to traffic that should transmit important information or be processed in
real-time, so high priority traffic is transmitted first, then low priority traffic is transmitted. It
makes the limited network resource such as bandwidth use efficiently.
QoS consists of the Classifier and the Traffic manager. The Classifier classifies traffic, and the
Traffic Manager processes the classified traffic as follows:
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The Classifier refers to a header of a received packet, and then decides the QoS level. The traffic
manager marks the QoS level to the packet header or processes a packet that is in permitted
bandwidth. The Traffic Manager also chooses which packet drop when congestion occurs or
prefers which packet transmits first.
The following section describes parameters to classify packets and how to classify packet.
Packet
In
Packet
Out
Queue
Scheduler
Classifier Marker Policer
Buffer
Manager
Traffic Manager