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Alarm Handling

CloudEngine 12800 and 12800E V200R005C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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ARP_1.3.6.1.4.1.2011.5.25.123.2.19 hwEthernetARPLimitExceed

ARP_1.3.6.1.4.1.2011.5.25.123.2.19 hwEthernetARPLimitExceed

Description

The number of ARP entries learned on the interface exceeded the threshold. (Interface name=[InterfaceName], Maximum number of ARP entries=[LimitNumber], Number of learned ARP entries=[LearnedNumber])

The number of dynamic ARP entries learned on the interface exceeded the alarm threshold and an alarm was generated.

Attributes

Attribute

Description

Alarm or Event

Alarm

Trap Severity

Warning

Mnemonic Code

INTERFACE_ARP_EXCEED

Trap OID

1.3.6.1.4.1.2011.5.25.123.2.19

Alarm ID

0x00F101f1

Alarm Type

qualityOfServiceAlarm

Raise or Clear

Raise

Match trap

ARP_1.3.6.1.4.1.2011.5.25.123.2.20 hwEthernetARPLimitExceedResume

Parameters

Parameter Description

Interface name

Interface name

LimitNumber

Maximum number of dynamic ARP entries that an interface can learn

LearnedNumber

Number of dynamic ARP entries that an interface has learned

VB Parameters

VB OID

VB Name

VB Index

1.3.6.1.4.1.2011.5.25.123.1.37.1.1

hwEthernetARPLimitExceedInterface

N/A

1.3.6.1.4.1.2011.5.25.123.1.37.1.2

hwEthernetARPLimitExceedLimitNumber

N/A

1.3.6.1.4.1.2011.5.25.123.1.37.1.3

hwEthernetARPLimitExceedLearntNumber

N/A

Impact on the System

If this alarm is generated, a large number of dynamic ARP entries have been learned on the interface. If the number of learned dynamic ARP entries continues to increase, memory resources become insufficient. As a result, the interface cannot learn new dynamic ARP entries and services are interrupted.

Possible Causes

The number of dynamic ARP entries learned on the interface exceeded the specified threshold.

Procedure

  1. Check whether the arp limit and arp limit alarm-threshold commands need to be run.

    • If the commands do not need to be run but have been run, run the undo arp limit and undo arp limit alarm-threshold commands to disable the ARP entry limit function.
    • If the commands need to be run, go to 2.

  2. Check whether the values of maximum and threshold-value specified using the arp limit and arp limit alarm-threshold commands are too small.

    • If the values are too small, run the arp limit command to increase the maximum number of dynamic ARP entries that the interface can learn, or run the arp limit alarm-threshold command to increase the alarm threshold for the maximum number of dynamic ARP entries that the interface can learn.
    • If the values are not too small, go to 3.

  3. Run the display arp interface command to check whether the ARP entries learned on a specified interface are needed.

    • If the ARP entries are needed, go to 5
    • If the ARP entries are not needed, run the reset arp command to clear the ARP entries without interrupting services, and then go to 4.

  4. Run the display arp statistics command to check whether the total number of ARP entries on the device is increasing.

    • If the number of ARP entries is not increasing, go to 6.
    • If the number of ARP entries is increasing, go to 5.

  5. Collect alarm information and configuration information, and then contact technical support personnel.
  6. End.
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Updated: 2019-04-20

Document ID: EDOC1100039527

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