Technical Tip: How To set the maximum number of ARP entries threshold

# config system global
    set arp-max-entry <integer>  <----- The maximum number of dynamically learned MAC addresses that can be added to the ARP table (131072 to 2147483647, default = 131072).
end

The arp-max-entry command is used to set the maximum number of dynamically learned MAC addresses that can be added to the ARP table on a network device. Here are some of the benefits of using this command:

Improved performance:

By setting a higher maximum number of ARP table entries, the device can handle more MAC addresses without having to constantly update or flush the table. This can lead to improved network performance and reduced latency.

Avoiding ARP table overflow:

ARP table overflow can occur when the number of dynamically learned MAC addresses exceeds the maximum number of entries allowed in the ARP table. This can result in dropped packets, network outages, and other connectivity issues. Setting a higher maximum number of ARP table entries, it helps avoid these issues.

Better security:

By limiting the number of MAC addresses that can be added to the ARP table, you can help prevent unauthorized devices from accessing the network. This is because only devices with MAC addresses that have been learned and added to the ARP table will be allowed to communicate on the network.