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•
Loop protection
—When the system detects a loop on a port, it automatically blocks that port
to avoid packet flooding. The system also displays the port as blocked in the Port Loop Info list
and the port state pane (yellow icon).
Loop prevention interval
Loop detection is a continuous process as the network changes. Loop detection frames are sent at
the loop detection intervals to determine whether loops occur on ports and whether loops are
removed.
Port state auto recovery
When the device detects a loop on a port and does not receive any loop detection packets within
the recovery interval, it assumes that the loop has been eliminated. The port is then automatically
restored to normal forwarding state. This process is the automatic port state recovery process.
Procedure
Configure Loop Prevention
1.
From the navigation pane, select
Monitoring
>
Loop Prevention
.
2.
To configure loop protection:
Select
Loop Protection
from the
Loop Feature
list.
Configure the detection interval. The default interval is two seconds.
Configure the recovery interval. The default interval is 10 seconds.
3.
To configure loop detection:
Select
Loop Detection
from the
Loop Feature
list.
Configure the detection interval. The default interval is two seconds.
Configure the recovery interval. The default interval is 10 seconds.
4.
Click
Submit
.
Displaying port loop information
After enabling loop prevention, you can view the port state information:
•
, port 3 is blocked because a loop is detected on it.
•
As shown in
, port 2 and port 3 are displayed with a red icon on the port state pane
because a loop is detected.