Transition Networks SISPM1040-182D user manual QoS Configuration, QoS Policy and Priority Type

Transition Networks SISPM1040-182D

6.21QoS Configuration

Quality of Service (QoS) is the ability to provide different priority to different applications, users or data flows, or to guarantee a certain level of performance to a data flow. QoS guarantees are important if the network capacity is insufficient, especially for real-time streaming multimedia applications such as voice over IP or Video Teleconferencing, since these often require fixed bit rate and are delay sensitive, and in networks where the capacity is a limited resource, for example in cellular data communication. In the absence of network congestion, QoS mechanisms are not required.

6.21.1 QoS Policy and Priority Type

Here you can choose to use an 8-4-2-1 queuing scheme or a strict priority scheme, or select the priority type to configure QoS policy.

„Qos Policy: Select the QoS policy rule.

¾Using the 8,4,2,1 weight fair queue scheme: The switch will follow 8:4:2:1 rate to process priority queue from High to lowest queue. For example, while the system processing, 1 frame of the lowest queue, 2 frames of the low queue, 4 frames of the middle queue, and 8 frames of the high queue will be processed at the same time in accordance with the 8,4,2,1 policy rule.

¾Use a strict priority scheme: Always the higher queue will be processed first, except the higher queue is empty.

¾Priority Type: There are 5 priority type selections available—Port-based, TOS only, COS only, TOS first, and COS first. Disable means no priority type is selected.

„Click

Apply to have the configuration take effect.

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