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Alarm Handling

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50

This document provides the explanations, causes, and recommended actions of alarms on the product.
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DHCPSNP_1.3.6.1.4.1.2011.5.25.112.2.1 hwDhcpSnpChaddrAlarm

DHCPSNP_1.3.6.1.4.1.2011.5.25.112.2.1 hwDhcpSnpChaddrAlarm

Description

The number of the discarded DHCP packets in which the CHADDR field is inconsistent with the source MAC address exceeded the threshold on the interface. (IfIndex=[IfIndex], VlanIndex=[VlanIndex], VsiIndex=[VsiIndex], Interface=[IfName], VlanID=[VlanId], DiscardedNumber=[DiscardPktAccount])

The number of the discarded DHCP packets in which the source MAC address carried in the CHADDR field is incorrect exceeded the configured threshold on the interface.

Attributes

Attribute

Description

Alarm or Event

Event

Trap Severity

Warning

Mnemonic Code

hwDhcpSnpChaddrAlarm

Trap OID

1.3.6.1.4.1.2011.5.25.112.2.1

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

VlanIndex

VLAN index

VsiIndex

VSI index

Interface

Interface name

VlanID

VLAN ID

DiscardedNumber

Number of discarded DHCP packets

VB

VB OID

VB Name

VB Index

1.3.6.1.4.1.2011.5.25.112.1.15.1.1

hwDhcpSnpStatisticIfDescr

hwDhcpSnpIfIndex;

hwDhcpSnpVlanIndex;

hwDhcpSnpVsiIndex;

1.3.6.1.4.1.2011.5.25.112.1.15.1.2

hwDhcpSnpStatisticVlanId

hwDhcpSnpIfIndex;

hwDhcpSnpVlanIndex;

hwDhcpSnpVsiIndex;

1.3.6.1.4.1.2011.5.25.112.1.15.1.3

hwChaddrNomatchSrcMacDhcpPktNum

hwDhcpSnpIfIndex;

hwDhcpSnpVlanIndex;

hwDhcpSnpVsiIndex;

Impact on the System

This alarm has no adverse impacts on the system, because attack DHCP packets with incorrect CHADDR fields are discarded.

Possible Causes

Attackers sent DHCP packets with incorrect CHADDR fields.

Procedure

  • Collect log files and contact technical support personnel.
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Updated: 2019-03-20

Document ID: EDOC1000166558

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