MSTP/4/PROTC_GUARDED: With the TC protection enabled, if TC BPDUs were received after the number of TC BPDUs received by an instance exceeded the threshold, these TC BPDUs were processed after the TC protection time expires. (ProcessID=[ProcessID], proTcGuard=[proTcGuard], InstanceID=[InstanceID], proInstBridgePriority=[proInstBridgePriority])
| Parameter Name | Parameter Meaning |
|---|---|
|
ProcessID |
Indicates the ID of an MSTP process. |
|
proTcGuard |
Indicates that the TC protection is enabled or disabled. |
|
InstanceID |
Indicates the instance ID. |
|
proInstBridgePriority |
Indicates the root priority. |
The number of TC messages received by an MSTP process in a specified period exceeded the threshold.
1. Check whether the network topology flapping occurs.
2. Run the display stp command to check whether the number of TC BPDUs exceeds the set threshold on the interface.
3. Locate the cause of the network topology flapping and rectify the fault. Then, check whether the alarm is cleared. If the alarm persists, go to Step 2.
4. Run the stp tc-protection threshold threshold command in the MSTP process view to reset the maximum number of TC BPDUs that the MSTP process can process. Then, check whether the alarm is cleared. If the alarm persists, go to Step 5.
5. Check whether the malicious attack exists.
6. Locate the attack source and remove the attack. Then, check whether the alarm is cleared. If the alarm persists, go to Step 7.
7. Collect alarm information and configuration information, and then contact technical support personnel.