Loopback Detection
The Loopback Detection function is used to identify loops occurring between the Switch and a device that is directly connected to it. This process is accomplished by the use of a Configuration Testing Protocol (CTP) packet that is generated by the switch. Users may set the dispatching time interval of the CTP packet and once a CTP packet has returned to the port from where it originated, the Loopback Detection function will disable this port until the anomaly has ceased, and the loopback occurrence will be noted in the Switch’s log. Once the loopback problem has stopped, this port will be automatically recovered in a time period that can also be specified by the user.
To configure the settings for the Loopback Detection feature, click L2 Features >
Loopback Detection
Figure 7- 19. Loopback Detection window
The following fields may be configured:
ParameterDescription
Loopdetect Status
Interval
Choose whether to globally enable or disable the Loopback Detection function by using this pull down menu.
Enter a time interval, between 1 and 32767 seconds, that CTP packets will be dispatched from Loopback Detection enabled ports. If this packet is returned, the port will be disabled. The default setting is 10 seconds.
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