ES4710BD 10 Slots L2/L3/L4 Chassis Switch
Robin).
In Profile: Traffic within the QoS policy range (bandwidth or burst value) is called “In Profile".
Out of Profile: Traffic out the QoS policy range (bandwidth or burst value) is called “Out of Profile".
16.1.2QoS Implementation
To implement Layer 3 switch software QoS, a general, mature reference model should be given. QoS can not create new bandwidth, but can maximize the adjustment and configuration for current bandwidth resources. Fully implemented QoS can achieve complete management over the network traffic. The following is as accurate as possible a description of QoS.
The data transfer specifications of IP cover only addresses and services of source and destination, and ensure correct packet transmission using OSI layer 4 or higher protocols such as TCP. However, rather providing and protecting packet transmission bandwidth, IP provides bandwidth service by best effort. This is acceptable for services like Mail and FTP, but for increasing multimedia business data and
Based on differentiated service, QoS specifies a priority for each packet at the ingress. The classification information is carried in the Layer 3 IP packet header or Layer 2 IEEE 802.1Q frame header. QoS provides same service to packets of the same priority, while offering different operations for packets of different priority. A
If devices of each hop in a network support differentiated service, an
16.1.3Basic QoS Model
The basic QoS consists of five parts: Classification, Policing, Remarking, Queuing and Scheduling, Classification, policing and remarking are sequential ingress actions. Queuing and Scheduling are QoS egress actions.
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