D-Link DES-3018 - Manual (Page 121)

DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
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Recover Time Enter a time, in seconds that a port will have to wait before being recovered from a Loopback
Detection shutdown. The user may set a time between 60 and 1000000 seconds with a default
setting of 60 seconds. The user may also enter a time of 0 which means that the port can only
be recovered manually by the user. This is done by going to the Port Configuration folder
located in the Administration folder and manually enabling these ports using the Port
Settings window.
From… To Choose a port or group of ports that are to be enabled for the Loopback Detection function.
State Use the pull-down menu to enable or disable the Loopback function for the selected ports.
Click Apply to implement changes made.