This value, constrained between 2 and 1024, sets the maximum number of unresolvable ARP packets the H3C device will accept from a single source within a five-second window before ARP source suppression starts dropping further packets from that source. An administrator tunes this threshold based on their network's normal ARP behavior, setting it low to aggressively guard against ARP floods or higher to avoid falsely suppressing a legitimate host generating a burst of ARP traffic. With the default value of 10, the device tolerates up to 10 unresolved ARP packets from one source every five seconds before suppressing that source further.