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DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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LOOPBACK INTERFACE COMMANDS
The Loopback Interface commands in the Command Line Interface (CLI) are listed (along with the appropriate
parameters) in the following table.
Command Parameters
config loopdetect {recover_timer [0 | <sec 60-1000000>] | interval <sec 1-32767> | mode [port-
based | vlan-based]}(1)
config loopdetect ports [<portlist> | all] state [enable | disable]
enable loopdetect
disable loopdetect
show loopdetect
show loopdetect ports {<portlist>}
config loopdetect trap [none | loop_detected | loop_cleared | both]
Each command is listed, in detail, in the following sections.
config loopdetect
Purpose This command is used to setup the loop-back detection function (LBD) for the entire Switch.
Syntax
config loopdetect {recover_timer [0 | <sec 60-1000000>] | interval <sec 1-32767> |
mode [port-based | vlan-based]}(1)
Description This command is used to setup the loop-back detection function (LBD) for the entire Switch.
Parameters
recover_timer - (Optional) The time interval (in seconds) used by the Auto-Recovery
mechanism to decide how long to check before determining that the loop status has gone.
The valid range is from 60 to 1000000. 0 is a special value that specifies that the auto-
recovery mechanism should be disabled. When the auto-recovery mechanism is disabled, a
user would need to manually recover a disabled port. The default value for the recover timer
is 60 seconds.
0 - Specifies that the value of 0 will be set to the recovery timer.
<sec 60-1000000> - Enter the recovery timer value here. This value must be between 60 and
1000000 seconds.
interval - (Optional) The time interval (in seconds) that the device will transmit all the CTP
(Configuration Test Protocol) packets to detect a loop-back event. The default setting is 10
seconds. The valid range is from 1 to 32767 seconds.
<sec - 1-32767> - Enter the time interval value here. This value must be between 1 and
32767 seconds.
mode - (Optional) Specify the loop-detection operation mode. In port-based mode, the port
will be shut down (disabled) when loop has been detected In VLAN-based mode, the port
cannot process the packets of the VLAN that has detected the loop.
port-based - Specifies that the loop-detection operation mode will be set to port-based mode.
vlan-based - Specifies that the loop-detection operation mode will be set to vlan-based mode.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage: