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Alarm Handling

S9300, S9300E, and S9300X V200R013C00

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

LBDT

LBDT_1.3.6.1.4.1.2011.5.25.174.3.3 hwLdtPortLoopDetect

Description

LBDT/4/PORTTRAP: OID [OID] Loopback exists on interface([INTEGER1]) [OCTET1] ([OCTET2]), loopback detection status: [INTEGER2], auto loop detection for trap only on VLAN [OCTET3].(Status 1:normal; 2:block; 3:shutdown; 4:trap; 5:nolearn; 6:quitvlan)

A loop is detected on the Layer 2 network connected to the interface.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.5.25.174.3.3 Warning communicationsAlarm(2)

Parameters

Name Meaning
OID Indicates the MIB object ID of the alarm.
INTEGER1 Indicates the interface index.
OCTET1 Indicates the interface name.
OCTET2 An alarm is reported when a loop is detected in a VLAN (not a VLAN in which loops are detected automatically and only alarms are reported). If untagged packets are used to detect the loop, the value of this parameter is Untagged. If tagged packets are used to detect the loop, the value of this parameter is the VLAN ID in the VLAN tag.
INTEGER2 Indicates the loop detection status on the interface.
OCTET3 Indicates the list of VLANs where loops are detected automatically. Only alarms are reported.

Impact on the System

After the interface is shut down, all traffic on the interface is interrupted.

After the interface is blocked, all traffic except protocol packets is interrupted.

After nolearn is configured on the interface, the interface does not learn MAC addresses.

After the trap function is configured on the interface, the interface continuously reports traps.

After the quitvlan function is configured on the interface, the interface is deleted from the VLAN where a loop occurs and services of traffic in the VLAN are interrupted.

Possible Causes

An Ethernet loop is detected between the interfaces.

Procedure

  • A loop occurs on the Layer 2 network connected to the interface.

LBDT_1.3.6.1.4.1.2011.5.25.174.3.4 hwLdtPortLoopDetectRecovery

Description

LBDT/4/PORTTRAP: OID [OID] Loopback is removed on interface([INTEGER1])[OCTET], loopback detection status: [INTEGER2]. (1:normal; 2:block; 3:shutdown; 4:trap; 5:nolearn; 6:quitvlan)

The loop on the interface is removed.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.5.25.174.3.4 Warning communicationsAlarm(2)

Parameters

Name Meaning
OID Indicates the MIB object ID of the alarm.
INTEGER1 Indicates the interface index.
OCTET Indicates the interface name.
INTEGER2 Indicates the loop detection status on the interface.

Impact on the System

None

Possible Causes

The loop between the interfaces is removed.

Procedure

  • This is a clear alarm and no action is required.
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Updated: 2019-04-09

Document ID: EDOC1100065855

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