Cooper Bussmann 5073E-T Manual de usuario descargar pdf (Pagina 63)

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Cooper Bussmann 5073E-T Managed Ethernet Switch User Manual

63Rev Version 1.1

6.5.10 QoS

Quality of Service (QoS) allows you to assign a priority to various applications, users, or data flows, or guarantee

a specific level of performance to a data flow. QoS guarantees are important if network capacity is insufficient,

particularly for real-time streaming multimedia applications, such as voice-over-P and video teleconferencing.

These applications often require a fixed bit rate. They are also delay sensitive and are in networks where capacity

is a limited resource—for example, cellular data communication. In the absence of network congestion, QoS

mechanisms are not required.

QoS Global Settings

To configure QoS policy, choose Configure-->QoS-->Global Settings. You can choose an 8-4-2-1 queuing

scheme, a strict priority scheme, or select a priority type.

Figure 66 QoS Global Settings

QoS Mode Select from the following modes, or select “Disable” to turn off QoS.

• Port Based—The output priority is determined by the ingress port.

• COS Only—The output priority is determined by COS (Class of Service) only.

• TOS Only—The output priority is determined by TOS (Type of Service) only.

• COS First—The output priority is determined by COS and TOS, but COS first.

• TOS First— The output priority is determined by COS and TOS, but TOS first.

QoS Policy Select the QoS policy rule:

Using the 8,4,2,1 weight fair queue scheme—The switch will follow 8:4:2:1 rate to

process priority queue from the highest to the lowest queue. For example, 8 high

queue packets, 4 middle queue packets, 2 low queue packets, and 1 lowest queue

packet are all transmitted at the same time, in accordance with the 8,4,2,1 policy rule.

Use a strict priority scheme—The switch will always process packets in the higher

queue first, until the higher queue is empty.

Apply Click to apply the settings.

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Cooper Bussmann 5073E-T Manual de usuario Pagina 63