The linux kernel ARP module supports lots of fine tuning options.
Most of which are modified using files located inside /proc.
You can find ARP related kernel files inside /proc/sys/net/ipv4/neigh/default.
ls /proc/sys/net/ipv4/neigh/default
result:
anycast_delay gc_interval locktime retrans_time_ms app_solicit gc_stale_time mcast_solicit ucast_solicit base_reachable_time gc_thresh1 proxy_delay unres_qlen base_reachable_time_ms gc_thresh2 proxy_qlen unres_qlen_bytes delay_first_probe_time gc_thresh3 retrans_time
You can grab explanations to these files and their entries from here: ARP Kernel Module Options.