STRIDE SE-MC2U-SC, Руководство пользователя, Страница: 118 / 230

Where the data originates (the camera or control system), configure the QoS/CoS settings for
the video camera ports as follows:
• Use 802.1p Tag Priority = Unchecked
• Use IP ToS/DiffServ = Unchecked
• Default Priority Precedence = Expedited
• Output Tag = Remove Tag
Also, configure the control system ports as follows:
• Use 802.1p Tag Priority = Unchecked
• Use IP ToS/DiffServ = Unchecked
• Default Priority Precedence = Urgent
• Output Tag = Remove Tag
In this way, the switches will handle the packets appropriately and tag them for handling
elsewhere in the network.
At the destination, configure the control system port as follows:
• Use 802.1p Tag Priority = Checked
• Output Tag = Remove Tag
Also, configure the video concentrator port as follows:
• Output Tag = Remove Tag
Result:
Configuring the video data to have a lower priority than control data results in the QoS
required for the control data.
In the following diagram, we have an IPm controlling a turbine and some torque converters.
In addition, we have a video concentrator device that is collecting video data. Since the
switch was configured such that video data (Triangles) has lower priority than control data
(circles), we see that the control data gets sent out more often than the video data. For clarity,
the diagram notes that untagged data in the network consists of open triangles and circles,
while tagged data in the network consists of filled triangles and circles. This achieves the QoS
needed for the control application.
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Chapter 4 - Managed Switch Software Setup
Stride Industrial Ethernet Switches User Manual 2nd Ed. Rev. A