Ping the broadcast address for your network to fill your arp cache:

# ping 192.168.0.255

[download]

where your network address is 192.168.0.0, and your netmask is 255.255.255.0.

Otherwise, arp has only those IPs you talked to.

In reply to Re: Re: mac to IP address? by cleverett
in thread mac to IP address? by Anonymous Monk

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