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Alarm Handling

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document provides the explanations, causes, and recommended actions of alarms on the product.
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MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.25 hwMstpProLoopbackDetected

MSTP_1.3.6.1.4.1.2011.5.25.42.4.2.25 hwMstpProLoopbackDetected

Description

The MSTP process's port has been set to discarding state because of detecting loopback. (ProcessID=[ProcessID], InstanceID=[InstanceID], PortID1=[PortID1], PortID2=[PortID2], PortID3=[PortID3], PortID4=[PortID4], PortIDFlag=[PortIDFlag], PortState=[PortState], IfIndex=[IfIndex], PortName=[PortName], PwName=[PwName])

When the port detected loopback, block the port and arise trap.

Attribute

Attribute Description

Alarm or Event

Event

Trap Severity

Warning

Mnemonic Code

hwMstpProLoopbackDetected

Trap OID

1.3.6.1.4.1.2011.5.25.42.4.2.25

Alarm ID

This is an event trap and does not involve alarm ID.

Alarm Type

This is an event trap and does not involve alarm type.

Raise or Clear

This is an event trap and does not involve alarm generation or clearance.

Match trap

This is an event trap and does not involve the matching trap.

Parameters

Parameter Description
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 interface index.
PortState Indicates the port state.
PortName Indicates the port name.
PwName Indicates the pw name.

VB

VB OID

VB Name

VB Index

1.3.6.1.4.1.2011.5.25.42.4.1.29.1.1

hwMstpProNewPortState

hwMstpProNewPortState

1.3.6.1.4.1.2011.5.25.42.4.1.33

hwMstpPwName

hwMstpPwName

1.3.6.1.2.1.31.1.1.1.1

ifName

ifName

Impact on the System

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 blocked port will be interrupted.

Possible Causes

The STP port of the equipment detected a loopback.

Procedure

  • The STP port of the equipment detected a loopback.
    1. Check whether a local loopback is configured on the interface where the alarm is generated.

      • If a local loopback is configured on the interface where the alarm is generated, go to Step 3.

      • If no local loopback is configured on the interface where the alarm is generated, go to Step 2.

    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.

    3. Delete the local loopback configuration, and check whether the alarm is cleared. If the alarm persists, go to Step 5.
    4. Remove the self-loop network cable from the hub and check whether the alarm is cleared. If the alarm persists, go to Step 5.
    5. Collect trap, log, and configuration information, and contact technical support personnel.
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Updated: 2019-04-02

Document ID: EDOC1100074754

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