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Detecting incorrect IP addresses (arp)

The arp command provides information about Ethernet/IP address translation. The command can be used to detect systems on the LAN that are configured with an incorrect IP address. The table that follows identifes options for the arp command and their functions.

Command

Function

arp -a [unix[kmem]]

Display all of the current ARP entries by reading the table from the file kmem (default /dev/kmem), based on the kernel file unix (default /kernel/unix )

arp -d hostname

Delete an entry for the host called hostname.

Note:
This option may only be used by the super-user.

arp -s hostname ether_address [temp] [pub] [trail]

Create an ARP entry for the host called hostname with the Ethernet address ether_address

arp -f filename

Read the file named filename and set multiple entries in the ARP tables

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