Note: This has to be different from the interface to which the IP datagrams will be routed.

When dumping the ARP cache, only entries matching the specified interface will be printed.

-i If, вЂ“device If: Select an interface.

-e: Shows the entries in default(Linux) Style.

-D, вЂ“use-device: Use the given interfaceвЂ™s hardware address.

If any host is down, there is no need of keeping its entry in arp cache so this command is used to delete those entries explicitly by the user.

-d hostname, вЂ“delete hostname: Removes any entry for the specified host.

If nothing is passed all entries will be displayed.

-a вЂ“all: This option is used for showing entries of the specified host.

List of possible hardware types(which support ARP) are ash(Ash), ether(Ethernet), ax25(AMPR AX.25), netrom (AMPR NET/ROM), rose (AMPR ROSE), arcnet (ARCnet), dlci (Frame Relay DLCI), fddi (Fiber Distributed Data Interface), hippi (HIPPI), irda (IrLAP), x25 (generic X.25), eui64 (Generic EUI-64).

-H type, вЂ“hw-type type, -t type: This tells arp which class of entries it should check for.

-n, вЂ“numeric: This option shows numerical addresses instead of symbolic host, port or usernames.

-v, вЂ“verbose: This option shows the verbose information.

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