TP-Link T1500-28TC TL-SL2428 T1500-28TCUN V1 Configuration Guide - Page 111
The following example shows how to enable loopback detection globally keeping the, default parameters
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Managing Physical Interfaces Loopback Detection Configuration Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 9 Step 10 Step 11 Step 12 loopback-detection Enable the loopback detection feature globally. By default, it is disabled. loopback-detection interval interval-time Set the interval of sending loopback detection packets which is used to detect the loops in the network. interval-time: The interval of sending loopback detection packets. The valid values are from 1 to 1000 seconds. By default, the value is 30 seconds. loopback-detection recovery-time recovery-time Set the recovery time, after which the blocked port in Auto Recovery mode can automatically recover to normal status. recovery-time: It is integral times of detection interval, ranging from 1 to 100. The default value is 3. interface { fastEthernet port | range fastEthernet port-list | gigabitEthernet port | range gigabitEthernet port-list } Enter interface configuration mode. loopback-detection Enable loopback detection of the port. By default, it is disabled. loopback-detection config [ process-mode { alert | port-based } ] [ recovery-mode { auto | manual } ] Set the process mode when a loopback is detected on the port. There are two modes: alert: The switch will only display alerts when a loopback is detected. It is the default setting. port-based: In addition to displaying alerts, the switch will block the port on which the loop is detected. Set the recovery mode for the blocked port. There are two modes: auto: After the recovery time, the blocked port will automatically recover to normal status and restart to detect loops in the network. manual: The blocked port can only be released manually. You can use the command 'loopback-detection recover' to recover the blocked port to normal status. show loopback-detection global Verify the global configuration of Loopback Detection. show loopback-detection interface { fastEthernet port | gigabitEthernet port } Verify the Loopback Detection configuration of the specified port. end Return to privileged EXEC mode. copy running-config startup-config Save the settings in the configuration file. The following example shows how to enable loopback detection globally (keeping the default parameters): Configuration Guide 90