Commands In The Qos Configuration Mode - Siemens SCALANCE XC-200 Configuration Manual

Load control
10.5 Service classes
The command prompt is as follows:
cli(config-qos)#
Further notes
You exit the QOS configuration modewith the command end or exit.
10.5.3

Commands in the QOS configuration mode

Quality of Service (QoS)
Quality of Service (QoS) is a method to allow efficient use of the existing bandwidth in a network.
QoS is implemented by prioritization of the data traffic. Incoming frames are sorted into a
Queue according to a certain prioritization and further processed. This gives certain frames
priority.
The different QoS methods influence each other and are therefore taken into account in the
following order:
1. The switch first checks whether the incoming frame is a broadcast or agent frame.
→ When the first condition is met, the switch takes into account the set priority with the
agent-priority or broadcast-priority command..
The switch sorts the frame into a queue according to the the cos-map command.
2. If the first condition is not met the switch checks whether the frame contains a VLAN tag.
→ If the second condition is met, the switch checks whether the priority ia enabled
(priority-enable).
If priority is enabled, the switch sorts the frame into a queue according to the the cos-
map command.
3. If the second condition is also not met the frames are further processed according to the
Trust mode. You configure the trust mode with the qos-trust-mode command.
Commands in this section
This section describes commands that you can call up in the QOS configuration mode.
In the global configuration mode, enter the qos command to change to this mode.
● If you exit the QOS configuration mode with the exit command, you return to the Global
configuration mode.
● If you exit the QOS configuration mode with the end command, you return to the Privileged
EXEC mode.
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SCALANCE XB-200/XC-200/XF-200BA/XP-200/XR-300WG Command Line Interface
Configuration Manual, 07/2017, C79000-G8976-C361-06