What Is the Effect of Excess ARP Reply Packets on the CPU?

If excess ARP Reply packets are sent to the CPU, the CPU may be overloaded. Run the display cpu-defend configuration packet-type arp-reply all and display cpu-defend statistics packet-type arp-reply all commands to whether excess ARP Reply packets are sent to the CPU.

In the display cpu-defend statistics packet-type arp-reply all command output. If the value of the Drop (Bytes) field is large, excess ARP Reply packets are sent to the CPU.

In this case, adjust the CIR value for the ARP Reply packet. If the CPU is attacked, obtain the packet header or enable the debugging to trace the attack source and add the attack source to the blacklist.

Improper CPCAR settings will affect services on your network. If you need to adjust CPCAR settings, you are advised to contact technical support personnel for help.