D-Link xStack DGS-3426, User Manual

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xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch
Loopback Detection Global Settings
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 Global Settings , which
will open the following window for the user to configure.
Figure 7- 35. Loopback Detection Global Settings window
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