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Full Discussion: arp questions
Top Forums UNIX for Advanced & Expert Users arp questions Post 302553010 by pludi on Tuesday 6th of September 2011 10:34:43 AM
Old 09-06-2011
Quote:
Originally Posted by COKEDUDE
Can someone please explain this output to me. Why doesn't ifconfig show the same info?

Code:
~ $ arp -a
? (10.71.0.1) at 00:1b:21:2b:eb:0c [ether] on eth0
^      ^                ^             ^        ^ Interface where this MAC was
|      |                |             |          seen
|      |                |             \ Hardware Type (ether == Ethernet)
|      |                \ MAC address of the remote host
|      \ IP address of the remote host
\ Host name of the remote host, if resolvable, ? otherwise

If you just use arp you'll get (at least on Linux) an output with fixed columns and headers.
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ARP2ETHERS(8)						      System Manager's Manual						     ARP2ETHERS(8)

NAME
arp2ethers - convert arpwatch address database to ethers file format SYNOPSIS
arp2ethers [ arp.dat file ] DESCRIPTION
arp2ethers converts the file /var/lib/arpwatch/arp.dat (or the file specified on the command line) into ethers(5) format on stdout. Usu- ally arp.dat is an ethernet/ip database file generated by arpwatch(8). The arpwatch daemon in Debian will create different arp.dat depend- ing on its configuration. All of them will be available at /var/lib/arpwatch/. FILES
/var/lib/arpwatch - default directory for arp.dat arp.dat - ethernet/ip address database SEE ALSO
arpwatch(8), ethers(5), rarp(8), arp(8), BUGS
Please send bug reports to arpwatch@ee.lbl.gov. AUTHORS
Original version by Craig Leres of the Lawrence Berkeley National Laboratory Network Research Group, University of California, Berkeley, CA. Modified for the Debian Project by Peter Kelemen, with additions from Erik Warmelink. The current version is available via anonymous ftp: ftp://ftp.ee.lbl.gov/arpwatch.tar.gz This manual page was contributed by Hugo Graumann. ARP2ETHERS(8)
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