Siemens SCALANCE XM-400 Configuration Manual page 253
Industrial ethernet switches
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Also See for SCALANCE XM-400:
- Configuration manual (960 pages) ,
- Operating instructions manual (80 pages) ,
- Instructions manual (60 pages)
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Table 2 has the following columns:
● Port
Shows the configurable ports.
The port is made up of the module number and the port number, for example port 0.1 is
module 0, port 1.
● Trust Mode
Select the required mode from the drop-down list:
Note
You configure the prioritization of the receiving port on the page "Layer 2 > VLAN > Port
Based VLAN".
You configure the assignment of the following priorities to a queue on the page ""Layer 2
> QoS > CoS Map".
● Receiving port
● VLAN tag
● Broadcast and agent frame
You configure the assignment of the DSCP prioritization to a queue on the page ""Layer 2
> QoS > DSCP Mapping".
– No Trust
– Trust COS
– Trust DSCP
– Trust COS-DSCP
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
The switch sorts the incoming frames into a queue according to the prioritization of the
receiving port.
If there is a DSCP value in the IP header, this is ignored. If a VLAN tag exists, its priority
value is replaced by the priority value of the receiving port.
If an incoming frame contains a VLAN tag, the switch sorts it into a queue according to
this prioritization.
If the frame does not contain a VLAN tag, the switch sorts the frame into a queue
according to the prioritization of the receiving port.
If there is a DSCP value in the IP header, this is ignored.
If an incoming frame contains a DSCP prioritization, the switch sorts it into a queue
according to this prioritization.
If the frame does not contain a DSCP prioritization, the switch sorts the frame into a
queue according to the prioritization of the receiving port.
If the frame contains a VLAN tag, this is ignored.
With an incoming frame, there is a sequential check of which prioritization it contains.
If it contains a DSCP prioritization, it is handled as in the "Trust DSCP" mode.
If it contains no DSCP prioritization, the switch checks whether it contains a VLAN tag.
If it contains a VLAN tag, the switch sorts it into a queue according to this prioritization.
If the frame contains neither a DSCP prioritization nor a VLAN tag, the switch sorts the
frame into a queue according to the prioritization of the receiving port.
Configuring with Web Based Management
5.5 The "Layer 2" menu
253
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