Debug Loopback-Detection; Loopback-Detection Control - Planet SGS-6341 Series Command Manual

Chapter 6 Commands for Port Loopback

6.1 debug loopback-detection

Command:
debug loopback-detection
Function:
After enabling the loopback detection debug on a port, BEBUG information will be generated when sending,
receiving messages and changing states.
Default:
Disabled by default.
Command Mode:
Admin Mode.
Usage Guide:
Display the message sending, receiving and state changes with this command.
Example:
Switch#debug loopback-detection
%Jan 01 03:29:18 2006 Send loopback detection probe packet:dev Ethernet1/0/10, vlan id 1
%Jan 01 03:29:18 2006 Send loopback detection probe packet:dev Ethernet 1/0/10, vlan id 2

6.2 loopback-detection control

Command:
loopback-detection control {shutdown |block| learning}
no loopback-detection control
Function:
Enable the function of loopback detection control on a port, the no operation of this command will disable the
function.
Parameters:
shutdown set the control method as shutdown, which means to close down the port if a port loopback is found.
block set the control method as block, which means to block a port by allowing bpdu and loopback detection
messages only if a port loopback is found.
learning disable the control method of learning MAC addresses on the port, not forwarding traffic and delete the
Detection Function
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SGS-6341 Series Command Guide