D-Link DES-1210-10/ME [52/129] Configuration loopback detection

D-Link DES-1210-10/ME [52/129] Configuration loopback detection
4 Configuration DES-1210 Metro Ethernet Managed Switch User Manual
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Configuration > Loopback Detection
The Loopback Detection function is used to detect the loop created by a specific port while Spanning Tree
Protocol (STP) is not enabled in the network, especially when the down links are hubs or unmanaged
switches. The Switch will automatically shutdown the port and sends a log to the administrator. The
Loopback Detection port will be unlocked when the Loopback Detection Recover Time times out. The
Loopback Detection function can be implemented on a range of ports at the same time. You may enable or
disable this function using the pull-down menu.
Figure 4.74 Configuration > Loopback Detection
Loopback Detection State: Use the drop-down menu to enable or disable loopback detection. The default
is Disabled.
Mode: Specify the Loopback Detection to be Port-based or VLAN-based.
Interval (1-32767): Set a Loop detection Interval between 1 and 32767 seconds. The default is 2 seconds.
Recover Time (0 or 60-1000000): Time allowed (in seconds) for recovery when a Loopback is detected.
The Loop Detection Recover Time can be set at 0 seconds, or 60 to 1000000 seconds. Entering 0 will
disable the Loop Detection Recover Time. The default is 60 seconds.
From Port: The beginning of a consecutive group of ports may be configured starting with the selected port.
To Port: The ending of a consecutive group of ports may be configured starting with the selected port.
State: Use the drop-down menu to toggle between Enabled and Disabled. Default is Disabled.
Click Apply to implement changes made.
Configuration > SNTP Settings > Time Settings
SNTP or Simple Network Time Protocol is used by the Switch to synchronize the clock of the computer. The
SNTP settings folders contain two windows: Time Settings and TimeZone Settings. Users can configure the
time settings for the switch, and the following parameters can be set or are displayed in the Time Settings
page.
Figure 4.75 Configuration > SNTP Settings > Time Settings

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