D-Link DES-1100-10MP Manual page 17

Fundamentals
Note, the port in Blocked mode (loop is detected) will also be "Disabled".
If "Auto Recover Function" is NOT enabled, meaning user needs to "manually"
enable the port.
Go page "Fundamental" -> "Port" -> "Port Configuration" to enable the port.
To enable specific port's loop detection function, user must enable "System Loop

Detection" first.
Once a port is blocked by detected loop condition, the port will stay in Blocked
mode. (see "Loop Status").
Note, the port in Blocked mode (loop is detected) will also be "Disabled". If "Auto
Recover Function" is NOT enabled, ("Fundamentals" -> "Loop Free" ->
"Loop Detection" -> "Loop Detection Settings" ->Auto Recover
Function"), meaning user needs to "manually" enable the port. Go page
"Fundamental" -> "Port" -> "Port Configuration" to enable the port.
"Fundamentals" -> "Loop Free" -> "Loop Detection" -> "Loop Detection

Settings" -> "Time Interval" set the time interval that the Switch send out ARP
for detecting loop.
( Enable "System Loop Detection" first.)
D-Link Web Smart Switch User Manual
17