ARP

Displays and modifies the IP-to-Ethernet or token ring physical address translation tables used by the Address Resolution Protocol (ARP). This command is available only if the TCP/IP protocol has been installed.

ARP /?

ARP [-a | -g] [inet_address] [-N [if_address]]

ARP -d inet_address [if_address]

ARP -s inet_address ether_address [if_address]

ether_address (NT3.1)

Specifies a physical address.

if_address (NT3.1)

Specifies, if present, the IP address of the interface whose address translation table should be modified. If not present, the first applicable interface is used.

inet_address (NT3.1)

Specifies an IP address in dotted decimal notation.

/? (NT2000)

Display help.

-a (NT3.1)

-g (NT3.1 ONLY)

Displays current ARP entries by querying TCP/IP. If inet_addr is specified, only the IP and physical addresses for the specified computer are displayed.

-d (NT3.1)

Deletes the entry specified by inet_addr.

-N (NT3.1)

Displays the ARP entries for the network interface specified by if_addr.

-s (NT3.5)

Adds an entry in the ARP cache to associate the IP address inet_addr with the physical address ether_addr. The physical address is given as 6 hexadecimal bytes separated by hyphens. The IP address is specified using dotted decimal notation. The entry is permanent, that is, it is automatically removed from the cache after the time-out expires.

SCHTASKS

none.

Display the ARP cache tables for all interfaces:

    arp -a

Display the ARP cache table for the interface that is assigned the IP address 10.0.0.99:

    arp -a -N 10.0.0.99

Add static ARP cache entry that resolves the IP address 10.0.0.80 to the physical address 00-AA-00-4F-2A-9C:

    arp -s 10.0.0.80 00-AA-00-4F-2A-9C

none.

External

DOS

none

Windows

none

Windows NT

NT3.1 NT3.5 NT3.51 NT4 NT2000 NTXP NT2003