arp — Manipulate the Address Resolution Protocol cache
Summary :
It is used to view/add/del kernel’s ARP cache table entries.
Example:
$ arp — Show ARP Cache table.
$ arp -v — For detailed output.
$ arp -n — Show Address in numeric. Don’t try to resolve the names.
$ arp wify — Show the ARP entry for wify host.
$ arp -a wify — Same as above.
$ arp -t ether — Only show ether HW class entries.
$ arp -i eth0 — Show ARP entries of eth0 interface.
# arp -d 192.168.1.100 — Delete the ARP entry for this IP.
# arp -s 192.168.1.200 00:0B:22:33:44:55 — Add a new entry.
# arp -f arps.txt — Same as above. Here data will be taken from the arps.txt file.
Read: man arp