Analysis of LAN Failure According to Gratuitous ARP Flooding

This paper focuses on the analysis of a sudden LAN failure.Using packet capture tools,we analyzed the data packet from the fault network,and excluded the possibility of human ARP attack based on the analysis result.We confirmed the main cause of network failure,breaking the conventional assumption of ARP attack.The study focuses on the reasons why Gratuitous ARP is produced from specific network equipment and on its flooding damage to the LAN.We put forward solutions to these failures and proved them in an effective way.