SOC_1.3.6.1.4.1.2011.5.25.165.1.11.23 hwL3LoopDetectAlarm

Trap Buffer Description

L3 loop detect alarmed. (ChassisID=[hwL3LoopDetectChassisID], Slot=[hwL3LoopDetectSlotID], IP=[hwL3LoopDetectIPAddr])

Layer 3 loop detection alarm is generated.

In VS mode, this trap is supported only by the admin VS.

Trap Attributes

Trap Attribute Description

Alarm or Event

Alarm

Trap Severity

Warning

Mnemonic Code

hwL3LoopDetectAlarm

Trap OID

1.3.6.1.4.1.2011.5.25.165.1.11.23

MIB

HUAWEI-SECURITY-MIB

Alarm ID

0x09e6200a

Alarm Name

hwL3LoopDetectAlarm

Alarm Type

equipmentAlarm

Raise or Clear

Raise

Match trap

SOC_1.3.6.1.4.1.2011.5.25.165.1.11.24 hwL3LoopDetectAlarmResume

Trap Buffer Parameters

Parameter Description

hwL3LoopDetectChassisID

Chassis ID.

hwL3LoopDetectSlotID

Slot ID.

hwL3LoopDetectIPAddr

IP address.

VB Parameters

VB OID VB Name VB Index

1.3.6.1.4.1.2011.5.25.165.1.18.1.1.1

hwL3LoopDetectChassisID

hwL3LoopDetectChassisID

hwL3LoopDetectSlotID

hwL3LoopDetectIPAddr

1.3.6.1.4.1.2011.5.25.165.1.18.1.1.2

hwL3LoopDetectSlotID

hwL3LoopDetectChassisID

hwL3LoopDetectSlotID

hwL3LoopDetectIPAddr

1.3.6.1.4.1.2011.5.25.165.1.18.1.1.3

hwL3LoopDetectIPAddr

hwL3LoopDetectChassisID

hwL3LoopDetectSlotID

hwL3LoopDetectIPAddr

Impact on the System

The route loops affects the packet forwarding path.

Possible Causes

When a routing loop occurs, a large number of TTL timeout packets are generated on the network. If the number of TTL timeout packets sent to the CPU is greater than or equal to 6000 within 1 minute, a 1-minute timer is started for sampling and analysis. If the number of packets reaches 1024 or the number of packets exceeds 100 when the timer expires, the destination IP addresses of top 5 packets are tracerted one by one. If a routing loop exists, an alarm is generated.

Procedure

1.Run the tracert command to trace destination IP address of the route displayed in the alarm. Check whether a loop exists on the link.

  • If a loop exists, remove the loop. If the alarm is cleared after the loop is removed, go to step 3. If the alarm persists after the loop is removed, go to step 2.
  • If no loop is detected, go to step 2.

2.Collect the alarm, log, and configuration information, and contact technical support personnel.

3.End.

Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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