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DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch CLI Reference Guide
580
Chapter 54
Loopback Detection (LBD)
Command List
config loopdetect {recover_timer [0 | <sec 60-1000000>] | interval <sec 1-32767> | mode [port-
based | vlan-based]}
config loopdetect ports [<portlist> | all] state [enable | disable]
show loopdetect ports {<portlist>}
config loopdetect trap [none | loop_detected | loop_cleared | both]
config loopdetect log state [enable | disable]
54-1 config loopdetect
Description
This command is used to setup the loop-back detection function (LBD) for the entire Switch.
Format
config loopdetect {recover_timer [0 | <sec 60-1000000>] | interval <sec 1-32767> | mode
[port-based | vlan-based]}
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 - 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.
<sec 60-1000000> - Enter the recovery timer value here. This value must be between 60 and
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
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 - Specify that the loop-detection operation mode will be set to port-based mode.
vlan-based - Specify that the loop-detection operation mode will be set to vlan-based mode.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
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