1-11 ARP Attack Protection ConfigurationWhen configuring ARP attack Protection, go to these sections for information you are interested in:z Configuring ARP Defense Against IP Packet Attacksz Configuring ARP Packet Rate Limitz Configuring Source MAC Address Based ARP Attack Detectionz Configuring ARP Packet Source MAC Address Consistency Checkz Configuring ARP Active Acknowledgementz Configuring ARP DetectionARP Attack Protection OverviewAlthough ARP is easy to implement, it provides no security mechanism and thus is prone to networkattacks. An attacker can sendz ARP packets by acting as a trusted user or gateway. As a result, the receiving device obtainsincorrect ARP entries, and thus a communication failure occurs.z A large number of IP packets with unreachable destinations. As a result, the receiving devicecontinuously resolves destination IP addresses and thus its CPU is overloaded.z A large number of ARP packets to bring a great impact to the CPU.For details about ARP attack features and types, refer to ARP Attack Protection Technology WhitePaper.Currently, ARP attacks and viruses are threatening LAN security. The device can provide multiplefeatures to detect and prevent such attacks. This chapter mainly introduces these features.ARP Attack Protection Configuration Task ListComplete the following tasks to configure ARP attack Protection:Task RemarksConfiguring ARP SourceSuppressionOptionalConfigure this function on gateways(recommended).ConfiguringARP DefenseAgainst IPPacket Attacks Enabling ARP BlackHole RoutingOptionalConfigure this function on gateways(recommended).Configuring ARP Packet Rate LimitOptionalConfigure this function on accessdevices (recommended).FloodpreventionConfiguring Source MAC Address BasedARP Attack DetectionOptionalConfigure this function on gateways(recommended).
