The Role of ARP

ARP packets as seen by tcpdump
23:14:09.029877 arp who-has 192.168.0.254 tell host.someisp.net
23:14:09.055681 arp reply 192.168.0.254 is-at 0:0:c:ce:c6:78
Viewing the ARP cache
# arp -a
? (192.168.0.254) at 00:00:0C:CE:C6:78 [ether] on eth0

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Dave Dittrich <dittrich@cac.washington.edu>
Last modified: Thu Dec 9 21:03:56 PST 1999