7
%Feb 24 15:04:29:667 2013 DeviceA LPDT/4/LPDT_LOOPED: A loop was detected on
Twenty-FiveGigE1/0/2.
%Feb 24 15:04:29:668 2013 DeviceA LPDT/4/LPDT_VLAN_LOOPED: A loop was detected on
Twenty-FiveGigE1/0/2 in VLAN 100.
%Feb 24 15:04:44:243 2013 DeviceA LPDT/5/LPDT_VLAN_RECOVERED: A loop was removed on
Twenty-FiveGigE1/0/1 in VLAN 100.
%Feb 24 15:04:44:243 2013 DeviceA LPDT/5/LPDT_RECOVERED: All loops were removed on
Twenty-FiveGigE1/0/1.
%Feb 24 15:04:44:248 2013 DeviceA LPDT/5/LPDT_VLAN_RECOVERED: A loop was removed on
Twenty-FiveGigE1/0/2 in VLAN 100.
%Feb 24 15:04:44:248 2013 DeviceA LPDT/5/LPDT_RECOVERED: All loops were removed on
Twenty-FiveGigE1/0/2.
The output shows the following information:
• Device A detected loops on Twenty-FiveGigE 1/0/1 and Twenty-FiveGigE 1/0/2 within a loop
detection interval.
• Loops on Twenty-FiveGigE 1/0/1 and Twenty-FiveGigE 1/0/2 were removed.
# Use the
display loopback-detection command to display the loop detection configuration
and status on devices, for example, Device A.
[DeviceA] display loopback-detection
Loop detection is enabled.
Loop detection interval is 35 second(s).
Loop is detected on following interfaces:
Interface Action mode VLANs
Twenty-FiveGigE1/0/1 Shutdown 100
Twenty-FiveGigE1/0/2 Shutdown 100
The output shows that the device has removed the loops from Twenty-FiveGigE 1/0/1 and
Twenty-FiveGigE 1/0/2 according to the shutdown action.
# Display the status of Twenty-FiveGigE 1/0/1 on devices, for example, Device A.
[DeviceA] display interface twenty-fivegige 1/0/1
Twenty-FiveGigE1/0/1 current state: DOWN (Loop detection down)
...
The output shows that Twenty-FiveGigE 1/0/1 is already shut down by the loop detection module.
# Display the status of Twenty-FiveGigE 1/0/2 on devices, for example, Device A.
[DeviceA] display interface twenty-fivegige 1/0/2
Twenty-FiveGigE1/0/2 current state: DOWN (Loop detection down)
...
The output shows that Twenty-FiveGigE 1/0/2 is already shut down by the loop detection module.
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