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Alarm Handling

AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009

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MSTP_1. hwMstpiPortStateDiscarding

MSTP_1. hwMstpiPortStateDiscarding


MSTP/4/PDISC:OID [oid] The port has been set to discarding state. (InstanceID=[INTEGER], PortInstanceID=[INTEGER], PortID=[INTEGER], IfIndex=[INTEGER], PortName=[STRING])

The link status changed, and the port enters the Discarding state.


Alarm ID Alarm Severity Alarm Type Warning communicationsAlarm(2)


Name Meaning


Indicates the MIB object ID of the alarm.


Indicates the instance ID.


Indicates the ID of the instance to which the interface belongs.


Indicates the port ID.


Indicates the interface index.


Indicates the interface name.

Impact on the System

The network topology will be changed.

Possible Causes


The network topology changes that the port changes from the Forwarding state into the Discarding state.


A new link is added. After the topology calculation, the port enters the Discarding state.


  1. View physical devices on the network to check whether new physical connections enabled with STP are added.

    • If so, go to Step 2.

    • If not, go to Step 3.

  2. Check whether the added physical link is necessary.

    • If so, go to Step 3.

    • If not, go to Step 4.

  3. Run the display stp [ process process-id ] [ instance instance-id ] [ interface { interface-type interface-number [ to interface-number ] }&<1-10> ] [ brief ] command to check whether the interfaces are consistent with the STP calculation results.

    • If so, go to Step 6.

    • If not, go to Step 5.

  4. Correctly deploy the network topology, and then check whether the alarm is cleared.

    • If the alarm is cleared, go to Step 6.

    • If the alarm is not cleared, go to Step 3.

  5. Collect alarm information and configuration information, and then contact technical support personnel.
  6. End.

Related Information


Updated: 2019-05-06

Document ID: EDOC1000174085

Views: 131146

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