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Date:      Wed, 13 Aug 2003 08:43:51 -0700
From:      Lars Eggert <larse@ISI.EDU>
To:        Nick Barnes <Nick.Barnes@pobox.com>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Translate MAC address to IP address
Message-ID:  <3F3A5CB7.5070006@isi.edu>
In-Reply-To: <65626.1060774393@thrush.ravenbrook.com>
References:  <65626.1060774393@thrush.ravenbrook.com>
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[-- Attachment #1 --]
Nick Barnes wrote:

> [-net seems to be the right forum for this.]
> 
> I have some MAC addresses from a local Ethernet segment.  I want to
> convert them into IP addresses.  How can I do that programmatically?

net/arping from port:

[root@nik: ~] arping -i em1 00:07:e9:0a:23:91
ARPING 00:07:e9:0a:23:91
60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=0 time=5.453 msec
60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=1 time=9.980 msec
60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=2 time=9.981 msec
^C
--- 00:07:e9:0a:23:91 statistics ---
3 packets transmitted, 3 packets received,   0% unanswered

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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