ARP Linux Command

arp COMMAND:

The arp command displays the kernel's IPv4 network by manipulating neighbour cache and ARP cache in various ways. ARP is the abbreviation for Address Resolution Protocol, which is used to find the address of a network neighbor for a given IPv4 address. The "arp" command is primarily used to clear address mapping entry and manually setting up one. This command is also used in debugging purposes by taking a complete dump of the ARP cache.
The "arp" command can also be used to add entries to the ARP table, or to delete an entry from the table or to display the contents of the table. That is ARP command is used to add an address for which to proxy arp, delete an address from the arp table or view the arp table itself or to force a permament entry into the arp table. Here is an example of adding arp table entries with arp table:
#] arp -s 192.168.100.17 -i eth3 -D eth3 pub

SYNTAX:

arp [-vn] [] [-i ] [-a] []
arp [-v] [-i ] -d [pub]
arp [-vnD] [] [-i ] -f []
arp [-v] [] [-i ] -s [temp]
arp [-v] [] [-i ] -Ds [netmask ] pub

OPTIONS:

EXAMPLE:

1. To display network card and Ethernet connectivity:
   arp
   The above command will produce the below output:
   Address HWtype HWaddress Flags Mask Iface
   192.168.0.1 ether c4:a8:1d:7d:96:10 C wlan0