VBST/4/LOOPDETECT

Message

VBST/4/LOOPDETECT: In VBST VLAN [ULONG], the port [STRING] was blocked because it received the VBST packets sent by itself.

When the port detected loopback, block the port.

Parameter Name	Parameter Meaning
[ULONG]	VLAN ID.
[STRING]	Indicates the port name.

The VBST port of the equipment detected a loopback.

Check whether a local loopback is configured on the interface where the log is generated.
- If a local loopback is configured on the interface where the log is generated, go to Step 3.
- If no local loopback is configured on the interface where the log is generated, go to Step 2.
Check whether a loop is formed by a hub and devices, one of which is connected to the interface.
- If a loop is formed by a hub and devices, one of which is connected to the interface, go to Step 4.
- If no loop is formed by a hub and devices, one of which is connected to the interface, go to Step 5.
Run the undo loopback command to delete the local loopback configuration, and check whether the log persists. If the log persists, go to Step 5.
Remove the self-loop network cable from the hub and check whether the log persists. If the log persists, go to Step 5.
Collect trap, log, and configuration information, and contact technical support personnel.