MSTP/4/PROLBDETECTGED:OID [OID] The MSTP Process's Port has been set to discarding state because of detecting loopback. (ProcessID=[INTEGER], InstanceID=[INTEGER], PortID1=[INTEGER], PortID2=[INTEGER], PortID3=[INTEGER], PortID4=[INTEGER], PortIDFlag=[INTEGER], IfIndex=[INTEGER], PortState=[INTEGER], PortName=[STRING])
When port detected loopback, block the port and arise trap.
| Alarm ID | Alarm Severity | Alarm Type |
|---|---|---|
| 1.3.6.1.4.1.2011.5.25.42.4.2.25 | Warning | communicationsAlarm(2) |
| Name | Meaning |
|---|---|
OID |
Indicates the MIB object ID of the alarm. |
ProcessID |
Indicates the MSTP process ID |
InstanceID |
Indicates the instance ID. |
PortID1 |
Indicates ID 1 of the port in the MSTP process. |
PortID2 |
Indicates ID 2 of the port in the MSTP process. |
PortID3 |
Indicates ID 3 of the port in the MSTP process. |
PortID4 |
Indicates ID 4 of the port in the MSTP process. |
PortIDFlag |
Indicates the port flag. |
IfIndex |
Indicates the port index. |
PortState |
Indicates the port state. |
PortName |
Indicates the port name. |
After detecting a port blocked by local loopback, the system considers that a network storm occurs and blocks the local port to prevent the network storm from affecting services of the entire network. Services on the block port will be interrupted.
When the STP port of the equipment receiving BPDU with the same designated bridge ID and designated port ID as this equipment and port, STP blocks this port and arises this trap for loopback detection will lead loop.
If so, go to Step 4.
If not, go to Step 2.
If so, go to Step 5.
If not, go to Step 3.