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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_1.3.6.1.4.1.2011.5.25.123.2.1 hwEthernetARPSpeedLimitAlarm

ARP_1.3.6.1.4.1.2011.5.25.123.2.1 hwEthernetARPSpeedLimitAlarm

Description

Packet speed exceeded the configured speed limit. (IfIndex=[IfIndex], SuppressValue=[SupValue], CurrentValue=[CurValue], SuppressType=[SupType], SourceIP=[SrcIp], DestinationIP=[DstIp], VpnInstance name=[VpnName])

The transmit rate of ARP packets or ARP Miss messages exceeded the configured rate limit.

Attributes

Attribute

Description

Alarm or Event

Event

Trap Severity

Warning

Mnemonic Code

hwEthernetARPSpeedLimitAlarm

Trap OID

1.3.6.1.4.1.2011.5.25.123.2.1

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
IfIndex Interface index
Suppress Value Rate limit of ARP packets or ARP Miss messages
Current Value Current transmit rate of ARP packets or ARP Miss messages
Suppress Type Type of packets that are suppressed: ARP packets or ARP Miss messages
Source Ip Source IP addresses of ARP packets or ARP Miss messages
Destination Ip Destination IP addresses of ARP packets or ARP Miss messages
Vpn instance name VPN instances that ARP packets or ARP Miss messages belong to

VB

VB OID

VB Name

VB Index

1.3.6.1.4.1.2011.5.25.123.1.4

hwEthernetARPSpeedLimitIfIndex

None

1.3.6.1.4.1.2011.5.25.123.1.5

hwEthernetARPSpeedLimitConfigured

None

1.3.6.1.4.1.2011.5.25.123.1.6

hwEthernetARPSpeedLimitCurrent

None

1.3.6.1.4.1.2011.5.25.123.1.7

hwEthernetARPSpeedLimitType

None

1.3.6.1.4.1.2011.5.25.123.1.8

hwEthernetARPSpeedLimitSrcIPAddr

None

1.3.6.1.4.1.2011.5.25.123.1.9

hwEthernetARPSpeedLimitDstIPAddr

None

1.3.6.1.4.1.2011.5.25.123.1.10

hwEthernetARPSpeedLimitVPNinstance

None

Impact on the System

If ARP packets are suppressed, the transmit rate of ARP packets exceeds the configured rate limit. As a result, some ARP packets are discarded and traffic cannot be forwarded normally.

If ARP Miss messages are suppressed, the transmit rate of ARP Miss messages exceeds the configured rate limit. As a result, some ARP Miss messages are discarded and ARP Request messages cannot be triggered. Therefore, traffic cannot be forwarded normally.

Possible Causes

Cause 1: The transmit rate of ARP packets exceeded the configured rate limit.

Cause 2: The transmit rate of ARP Miss messages exceeded the configured rate limit.

Procedure

  • Cause 1: The transmit rate of ARP packets exceeded the configured rate limit.
    1. Run the display arp anti-attack rate-limit command to check the configured rate limit of ARP packets.
    2. Run the arp anti-attack rate-limit destination-ip maximum maximum command to re-set the rate limit of ARP packets. The value must be greater than the value obtained in Step 1 but less than 65536. Then, check whether the trap is cleared.

      • If the trap is cleared, go to Step 4.
      • If the trap persists, go to Step 3.

    3. Collect trap, log, and configuration information, and contact technical support personnel.
    4. End.
  • Cause 2: The transmit rate of ARP Miss messages exceeded the configured rate limit.
    1. Run the display arp miss anti-attack rate-limit command to check the configured rate limit of ARP Miss messages.
    2. Run the arp miss anti-attack rate-limit source-ip command to re-set the rate limit of ARP Miss messages. The value must be greater than the value obtained in Step 1 but less than 65536. Then, check whether the trap is cleared.

      • If the trap is cleared, go to Step 4.
      • If the trap persists, go to Step 3.

    3. Collect trap, log, and configuration information, and contact technical support personnel.
    4. End.
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Updated: 2019-04-20

Document ID: EDOC1100039527

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