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.TH ARPSNMP 8 "17 September 2000"
.UC 4
.SH NAME
arpsnmp - keep track of ethernet/ip address pairings
.SH SYNOPSIS
.B arpsnmp
[
.B -d
] [
.B -f
.I datafile
] [
.B -e
.I username
] [
.B -s
.I username
]
.I file
[
.I ...
]
.SH DESCRIPTION
.B Arpsnmp
keeps track for ethernet/ip address pairings. It syslogs activity
and reports certain changes via email.
.B Arpsnmp
reads information from a file (usually generated by
.BR snmpwalk (1)).
.LP
The
.B -d
flag is used enable debugging. This also inhibits mailing the reports.
Instead, they are sent to
.IR stderr .
.LP
The
.B -f
flag is used to set the ethernet/ip address database filename.
The default is
.IR arp.dat .
.LP
Note that an empty
.I arp.dat
file must be created before the first time you run
.BR arpsnmp .
.LP
If the
.B -e 
flag is used, 
.B arpsnmp
sends e-mail messages to
.I username
rather than the default (root).
If a single `-' character is given for the username,
sending of e-mail is suppressed,
but logging via syslog is still done as usual.
(This can be useful during initial runs, to collect data
without being flooded with messages about new stations.)
.LP
If the
.B -s 
flag is used, 
.B arpsnmp
sends e-mail messages with
.I username
as the return address, rather than the default (root).
.LP
.SH "REPORT MESSAGES"
(See the
.BR arpwatch (8)
man page for details on the report messages generated by
.BR arpsnmp (8).)
.SH FILES
.na
.nh
.nf
/var/lib/arpwatch - default directory
arp.dat - ethernet/ip address database
ethercodes.dat - vendor ethernet block list
.ad
.hy
.fi
.SH "SEE ALSO"
.na
.nh
.BR arpwatch (8),
.BR snmpwalk (1),
.BR arp (8)
.ad
.hy
.SH AUTHORS
Craig Leres of the
Lawrence Berkeley National Laboratory Network Research Group,
University of California, Berkeley, CA.
.LP
The current version is available via anonymous ftp:
.LP
.RS
.I ftp://ftp.ee.lbl.gov/arpwatch.tar.gz
.RE
.SH BUGS
Please send bug reports to arpwatch@ee.lbl.gov.
.LP
Attempts are made to suppress DECnet flip flops but they
aren't always successful.