Loopback Detection Settings - D-Link xStack DES-3528 series User Manual

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xStack DES-3528/DES-3552 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual

Loopback Detection Settings

The Loopback Detection function is used to detect the loop created by a specific port. This feature is used to
temporarily shutdown a port on the Switch when a CTP (Configuration Testing Protocol) packet has been looped back
to the switch. When the Switch detects that CTP packets are received from a port or a VLAN, it signifies a loop on the
network. The Switch will automatically block the port or the VLAN and send an alert to the administrator. The
Loopback Detection port will restart (change to discarding state) when the Loopback Detection Recover T ime 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 pull-down menu.
To view this window, click L2 Features > Loopback Detection Settings:
Parameter Description
State
Mode
Trap Status
Recover Time
(0 or 60-1000000)
Interval (1-32767)
From Port
To Port
State
Click Apply to implement changes made.
Figure 3 - 60 Loopback Detection Settings window
Use the drop-down menu to enable or disable loopback detection. The default is
Disabled.
Use the drop-down menu to toggle between Port Based and VLAN Based.
Select the trap status, choose None, Loop Detected, Loop Cleared or Both.
Time allowed (in seconds) for recovery when a Loopback is detected. The Loopdetect
Recover Time can be set at 0 seconds, or 60 to 1000000 seconds. Entering 0 will
disable the Loopdetect Recover Time. The default is 60 seconds.
Set a Loopdetect Interval between 1 and 32767 seconds. The default is 10 seconds.
Use the drop-down menu to select a beginning port number.
Use the drop-down menu to select an ending port number.
Use the drop-down menu to toggle between Enabled and Disabled.
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