Enabling loopback detection on an Ethernet interface
Loop detection on switch ports – Keenetic
Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from Blocking to Forwarding in a Spanning Tree - Technical Documentation - Support - Juniper Networks
What is a network loop? - NETGEAR Support
Kinjoinsingle Channel Vehicle Loop Detector(input Voltage For Automatic Parking Gate And Door Openers,car Parking 12/24/110/220v - Vehicle Detector - AliExpress
Loopback-detect function not supported over trunk interface- Huawei