Quality of Services (QoS) techniques aim to ensure a reliable transmission for all type of services, especially for the most demanding ones, in terms of delay, jitter, packet loss and availability. The QoS techniques The QoS techniques are applied from inbound to outbound and include: traffic selection and prioritization, queuing, packet scheduling and traffic shaping.

QoS strategies QoS strategies were introduced for the InfiLINK XG units in order to be able to customize the balance between the maximum achievable capacity and the allowed packet loss for the priority packets. The QoS capabilities The QoS capabilities of the unit fall in two categories:

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QoS wired interface capabilities

The wired interface capabilities of InfiLINK XG unit are the following:

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The IEEE 802.1p standard provides the means to implement QoS implement QoS techniques at Layer 2 (MAC layerMAC layer). QoS is  QoS is implemented using a 3 bit field called Priority Code Point (PCP) part of the Ethernet header when 802.1Q VLAN tagging 1Q VLAN tagging is in use.

There are eight 802.1p priorities, “0” being the lowest and “7” - the highest. The InfiLINK XG unit is capable to recognize and prioritize packets received on the wired interfaces. Each packet will be further sent to a specific priority queue.

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Each received packet is sent to one of the 4 priority queues based on the PCP field the PCP field that contains the 802.1p priority.

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• Strict or Weighted Round Robin packet scheduling algorithms

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QoS

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radio interface capabilities

The radio interface QoS capabilities QoS radio interface capabilities of the InfiLINK XG unit are the following:

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The same considerations mentioned for the wired interface capabilities are valid: each received packet is sent to one of the 4 priority queues based on the PCP field the PCP field that contains the 802.1p priority.

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Go to the “Switch” menu page in the Web interface and configure the “QoS modeQoS mode” parameter in the “Switch Port Settings” section. In the example below the “Weighted Round Robin” is configured for the "ge0" interface and the “Strict” scheduling algorithm is configured for the "radio" interface

• Traffic Prioritization

Traffic Prioritization is available for the radio interface transmission in order to accommodate different packet loss requirements for the high priority packets:

To enable or /disable the traffic prioritization, go to the “Radio” menu page in the Web interface and set the check/uncheck “Traffic Prioritization” parameter:

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