TP-Link T2500G-10TS - Loopback Detection

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5.1.5 Loopback Detection
With loopback detection feature enabled, the switch can detect loops using loopback
detection packets. When a loop is detected, the switch will display an alert or further block the
corresponding port according to the port configuration.
Choose the menu Switching→Port→LoopbackDetection to load the following page.
Figure 5-6 Loopback Detection Config
The following entries are displayed on this screen:

Global Config
LoopbackDetection
Status:
Here you can enable or disable
Loopback Detection function
globally.
Detection Interval:
Set a Loopback Detection interval between 1 and 1000
seconds. By default, it’s 30 seconds.
Automatic
Recovery Time:
Time after which the blocked port would automatically recover
to normal status. It can be set as integral times of detection
interval.
Web Refresh Status:
Here you can enable or disable web automatic refresh.
Web Refresh Interval:
Set a web refresh interval between 3 and 100 seconds. By
default, it’s 6 seconds.