System information

DGS-3000 Series Layer 2 Managed Gigabit Switch Web UI Reference Guide
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Loopback Detection port will restart (change to normal state) when the Loopback Detection Recover Time times
out. The Loopback Detection function can be implemented on a range of ports at a time. The user may enable or
disable this function using the drop-down menu.
NOTE: LBD should be disabled on the ring ports before enabling ERPS.
To view this window, click Security > Loopback Detection Settings as shown below:
Figure 8-56 Loopback Detection Settings window
The fields that can be configured are described below:
Parameter Description
Loopback Detection
State
Use the radio button to enable or disable loopback detection. The default is
Disabled.
Mode
Use the drop-down menu to toggle between Port-based and VLAN-based.
Trap State
Set the desired trap status: None, Loop Detected, Loop Cleared, or Both.
Log State
Specifies the state of the log for loopback detection.
Interval (1-32767)
The time interval (in seconds) that the device will transmit all the CTP (Configuration
Test Protocol) packets to detect a loop-back event. The valid range is from 1 to
32767 seconds. The default setting is 10 seconds.
Recover Time (0 or 60-
1000000)
Time allowed (in seconds) for recovery when a Loopback is detected. The Loop-
detect Recover Time can be set at 0 seconds, or 60 to 1000000 seconds. Entering 0
will disable the Loop-detect Recover Time. The default is 60 seconds.
From Port / To Port
Use the drop-down menus to select a range of ports to be configured.
State
Use the drop-down menu to toggle between Enabled and Disabled.
Click the Apply button to accept the changes made for each individual section.