DHCPSNP_1.3.6.1.4.1.2011.5.25.112.2.1 hwDhcpSnpChaddrAlarm

Trap Buffer 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 discarded DHCP packets in which source MAC addresses in the CHADDR fields do not match those in frame headers exceeded the configured threshold.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Warning
Mnemonic Code	REQMACTRAP
Trap OID	1.3.6.1.4.1.2011.5.25.112.2.1
MIB	HUAWEI-DHCP-SNOOPING-MIB
Alarm ID	This is an event trap and does not involve alarm ID.
Alarm Name	This is an event trap and does not involve alarm name.
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	-

Trap Buffer Parameters

Parameter	Description
IfIndex	Indicates the interface index.
VlanIndex	Indicates the VLAN index.
VsiIndex	Indicates the VSI index.
IfName	Indicates the interface name.
VlanId	Indicates the VLAN ID.
DiscardPktAccount	Indicates the number of discarded DHCP packets.

VB Parameters

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

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

The number of discarded DHCP packets in which source MAC addresses in the CHADDR fields do not match those in frame headers exceeded the configured threshold.

Procedure

1.Check whether the configured threshold for the number of discarded DHCP packets in which source MAC addresses in the CHADDR fields do not match those in frame headers is proper and whether the device is attacked, so that you can determine whether to adjust the alarm threshold.

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