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Alarm Handling

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides the trap description, attributes, parameters, impact on the system, possible causes, procedures, and references. This document provides a complete set of traps, through which intended readers are kept of the running status of the device so as to locate faults.
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DHCP_1.3.6.1.4.1.2011.5.25.112.2.4 hwUntrustedReplyPktAlarm

DHCP_1.3.6.1.4.1.2011.5.25.112.2.4 hwUntrustedReplyPktAlarm

Description

DHCP/1/REPLYTRAP:OID [OID] The number of the discarded DHCP reply packets on the untrusted interface exceeds the threshold. (IfIndex=[INTEGER], VlanIndex=[INTEGER], Interface=[OCTET], VlanID=[INTEGER], DiscardedNumber=[INTEGER])

The number of DHCP Reply packets discarded on the untrusted interface exceeded the threshold.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.5.25.112.2.4 Critical equipmentAlarm(5)

Parameters

Name Meaning
OID Indicates the MIB object ID of the alarm.
IfIndex Indicates the interface index.
VlanIndex Indicates the VLAN index.
Interface Indicates the interface name.
VlanID Indicates the VLAN ID.
DiscardedNumber Indicates the number of discarded packets.

Impact on the System

Invalid DHCP packets are discarded.

Possible Causes

Bogus DHCP server attacks occurred.

Procedure

  1. Check whether the DHCP server connected to the interface is forged by an unauthorized user. If the DHCP server is valid, run the dhcp snooping trusted command on the interface to set the interface status to trusted.
  2. Check whether the DHCP server connected to the interface is forged by an unauthorized user. If the DHCP server is valid, run the dhcp snooping trusted command on the interface to set the interface status to trusted.

Related Information

None.

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Updated: 2019-05-07

Document ID: EDOC1100034065

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