ALM-3276800092 Port attack occurred

Description

SECE/4/STRACKPORT: OID [OID] An attack occurred. (Interface=[OCTET], InnerVlan=[INTEGER], OuterVlan=[INTEGER], EndTime=[OCTET], TotalPackets=[INTEGER])

The system detects an attack on an interface.

Attribute

Alarm ID	Alarm Severity	Alarm Type
3276800092	Warning	securityServiceOrMechanismViolation(10)

Parameters

Name	Meaning
OID	Indicates the MIB object ID of the alarm.
Interface	Indicates the access interface of the attacker.
InnerVlan	Indicates the inner VLAN ID of the attacker.
OuterVlan	Indicates the outer VLAN ID of packets sent from the attacker.
EndTime	Indicates the end time of the attack.
TotalPackets	Indicates the number of packets received from the attacker.

Impact on the System

The CPU is busy processing attack packets. As a result, normal service packets cannot be processed in time or even discarded.

Possible Causes

The rate of packets with the specified interface and VLAN ID sent to the CPU exceeds the alarm threshold specified by the auto-defend threshold command. By default, the alarm threshold is 60 pps.

Procedure

Run the display auto-defend attack-source detail command to check the possible attack source on an interface and check whether the interface is normal according to the packet increase rate in entries.
If an attack is initiated by a user and the user is the only one connected to the interface, you can shut down the interface and check whether the interface is normal.
If the interface is connected to multiple users and some users initiate attacks, you can configure attack source tracing and set the action taken on attack packets to deny, or configure a traffic policy to discard attack packets.
If only entries exist on the interface or entries cannot be determined, collect device configurations, alarms, and logs, and then contact technical support personnel.
End.