Siemens SCALANCE User Manual

3 Detailed checklist
Checklist
Article ID: 109745536, V2.0, 05/2022
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3.11.3 Passive listening
Menu path
You can find this information in the following paths:
• With MSPS: "Layer 2 > Configuration"
• With X-200 and X-300: "Switch > Configuration"
Recommendation
"Passive Listening" is disabled by default on most SCALANCE X devices.
If there is no constellation in the network that relies on a coupling from STP to an
HRP ring or MRP ring, for example, then disable "Passive Listening".
Note
"Passive Listening" causes the SCALANCE device to forward BPDUs. An incoming
topology change causes it to delete its MAC address table.
The SCALANCE device deletes the MAC address table even if the device itself has
not enabled STP or does not support STP at all.

Siemens SCALANCE Specifications

General

Product Family	SCALANCE
Function	Ethernet Switch
Temperature Range	-40°C to +70°C (depending on model)
Protection Class	IP20, IP30 (depending on the model)
Mounting	DIN rail, wall mounting (depending on the model)
Power Supply	24 V DC
Number of Ports	Varies by model (e.g., 4, 8, 24 ports)
Type	Managed, Unmanaged
Subtypes	X, W, M, S
Certifications	CE, ATEX, IECEx (depending on the model)
Network Protocols	PROFINET, Ethernet