Siemens SCALANCE XM-400 Configuration Manual page 250

Configuring with Web Based Management
5.5 The "Layer 2" menu
Description of the displayed boxes
The table has the following columns:
● CoS
Shows the CoS priority of the incoming packets.
● Queue
From the drop-down list, select the forwarding queue (send priority) that is assigned to the
CoS priority.
The higher the number of the queue, the higher the send priority.
With queues 1 - 6 frames with a lower priority are occasionally processed even if there are
frames with high priority in the queue.
With queues 7 - 8 only frames with a high priority are processed as long as there are frames
with high priority in the queue.
The service classes (CoS) are assigned to the queues as follows:
● CoS 0 → Queue 2
● CoS 1 → Queue 1
● CoS 2 → Queue 3
● CoS 3 → Queue 4
● CoS 4 → Queue 5
● CoS 5 → Queue 6
● CoS 6 → Queue 7
● CoS 7 → Queue 8
Steps in configuration
1. For each value in the "CoS" column, select the forwarding queue from the "Queue" drop-
down list.
2. Click the "Set Values" button.
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SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12