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Alarm Handling

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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VBST_1. hwVbstPVNumExceeded

VBST_1. hwVbstPVNumExceeded


VBST/4/PORTVLANEXCEED:OID [OID] The limit of port-VLAN exceeded.(entPhysicalIndex=[ULONG],entPhysicalName=[STRING],MaxNum=[ULONG])

The number of interfaces and VLANs participating in VBST calculation exceeded the maximum number of interfaces and VLANs allowed by VBST.


These alarms can be only queried through a command but not the MIB.


Alarm ID Alarm Severity Alarm Type Warning qualityOfServiceAlarm(3)


Name Meaning
OID Indicates the ID of a MIB object.
entPhysicalIndex Indicates the index of the slot number participating in VBST calculation.
entPhysicalName Indicates the name of the slot number participating in VBST calculation.
MaxNum Indicates the number of interfaces and VLANs participating in VBST calculation.

Impact on the System

  • The VBST calculation efficiency will be affected, delaying network loop breaking.
  • The CPU usage may become high, the calculation of other protocols is affected, and even the device may fail to be managed by the NMS.

Possible Causes

VBST performed spanning tree calculation based on VLANs. As a result, all the interfaces added to a VLAN participated in VBST calculation by default.


  1. Check whether all the interfaces participating in VBST calculation must be added to the VLAN.

    • If it is unnecessary, remove some interfaces from the VLAN and check whether the alarm is cleared. If the alarm persists, go to step 2.
    • If it is necessary, go to step 2.

  2. Run the stp disable command in the views of the interfaces that do not need to participate in VBST calculation to disable interfaces from performing spanning tree calculation. Check whether the alarm is cleared. If the alarm persists, go to step 3.
  3. Collect alarm, log, and configuration information, and contact technical support personnel.
Updated: 2019-08-21

Document ID: EDOC1000142054

Views: 191175

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