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Example

Enable the loopback detection function of ports 1-3:

TL-SG2424(config)# interface range gigabitEthernet 1/0/1-3

TL-SG2424(Config-if-range)# loopback-detection

loopback-detection config

Description

The loopback-detection config command is used to configure the

process-mode and recovery-mode for the ports by which the switch copes with

the detected loops.

Syntax

loopback-detection config [ process-mode { alert | port-based }]

[ recovery-mode { auto | manual }]

Parameter

process-mode —— The mode how the switch processes the detected loops.

Alert: When a loop is detected, display an alert.

Port based: When a loop is detected, display an alert and block the port.

recovery-mode —— The mode how the blocked port recovers to normal status.

Auto: Block status can be automatically removed after recovery time.

Manual: Block status can only be removed manually.

Command Mode

Interface Configuration Mode (interface gigabitEthernet / interface range

gigabitEthernet)

Example

Configure the loopback detection process-mode as port-based and

recovery-mode as manual for port 2:

TL-SG2424(config)# interface gigabitEthernet 1/0/2

TL-SG2424(config-if)# loopback-detection config process-mode port-based

recovery-mode manual

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