ALM-3276800097 Invalid ARP packet

Description

SECE/4/ARP_PACKET_CHECK: OID [OID] Invalid packet. (SourceInterface=[OCTET], SourceIP=[OCTET], SourceMAC=[OCTET], OuterVlan=[INTEGER], InnerVlan=[INTEGER])

The system detects invalid ARP packets.

Attribute

Alarm ID	Alarm Severity	Alarm Type
3276800097	Warning	Equipment alarm

Parameters

Name	Meaning
OID	Indicates the MIB object ID of the alarm.
SourceInterface	Indicates the source interface of packets.
SourceIP	Indicates the source IP address of packets.
SourceMAC	Indicates the source MAC address of packets.
OuterVlan	Indicates the outer VLAN ID of packets.
InnerVlan	Indicates the inner VLAN ID of packets.

Impact on the System

If this alarm is generated, the device may be attacked. If the attack traffic volume is heavy, the device is busy processing attack packets. As a result, services of authorized users are interrupted.

Possible Causes

The device receives invalid ARP packets.

Procedure

Find the interface where the gateway conflict occurs according to the value of SourceInterface.
Lock the user who sends gateway conflict packets according to the values of SourceMAC and PVLAN.
Check whether the allocated address of the user conflicts with the gateway address. If the address conflicts, allocate an address to the user again. If the address does not conflict, the user may be the attacker. In this case, you can take such measures as disconnecting the user.