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MTR(8)			       mtr			   MTR(8)

NAME
       mtr - a network diagnostic tool

SYNOPSIS
       mtr    [-hvrctglsni]   [--help]	 [--version]   [--report]
       [--report-cycles COUNT]	 [--curses]   [--split]	  [--raw]
       [--no-dns]  [--gtk]  [--interval SECONDS] [--psize BYTES |
       -p BYTES] HOSTNAME [PACKETSIZE]

DESCRIPTION
       mtr combines the functionality of the traceroute and  ping
       programs in a single network diagnostic tool.

       As  mtr	starts,	 it  investigates  the network connection
       between the host mtr  runs  on  and  HOSTNAME.	After  it
       determines  the	address	 of  each network hop between the
       machines, it sends a sequence ICMP ECHO requests	 to  each
       one  to determine the quality of the link to each machine.
       As it does this, it prints running statistics  about  each
       machine.

OPTIONS
       -h

       --help
	      Print the summary of command line argument options.

       -v

       --version
	      Print the installed version of mtr.

       -r

       --report
	      This option puts mtr into	 report	 mode.	 When  in
	      this  mode,  mtr	will run for the number of cycles
	      specified by the -c option, and then print  statis
	      tics and exit.

	      This mode is useful for generating statistics about
	      network quality.	Note that each	running	 instance
	      of  mtr  generates  a significant amount of network
	      traffic.	Using mtr to measure the quality of  your
	      network	 may	result	 in   decreased	  network

mtr			  March 4, 1999				1

MTR(8)			       mtr			   MTR(8)

	      performance.

       -c COUNT

       --report-cycles COUNT
	      Use this option to set the number of pings sent  to
	      determine	 both the machines on the network and the
	      reliability of those machines.   Each  cycle  lasts
	      one second.  This option is only useful with the -r
	      option.

       -p BYTES

       --psize BYTES

       PACKETSIZE
	      These options or a trailing PACKETSIZE on the  com
	      mandline sets the packet size used for probing.  It
	      is in bytes inclusive IP and ICMP headers

       -t

       --curses
	      Use this option to force	mtr  to	 use  the  curses
	      based terminal interface (if available).

       -n

       --no-dns
	      Use  this option to force mtr to display numeric IP
	      numbers and not try to resolve the host names.

       -g

       --gtk
	      Use this option to force mtr to use the GTK+  based
	      X11  window  interface  (if  available).	GTK+ must
	      have been available on  the  system  when	 mtr  was
	      built  for  this to work.	 See the GTK+ web page at
	      http://www.gimp.org/gtk/ for more information about
	      GTK+.

       -s

       --split
	      Use  this	 option	 to  set mtr to spit out a format
	      that is suitable for a split-user interface.

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MTR(8)			       mtr			   MTR(8)

       -l

       --raw
	      Use this option to tell mtr to use the  raw  output
	      format.  This  format is better suited for archival
	      of the measurement results. It could be  parsed  to
	      be presented into any of the other display methods.

       -i SECONDS

       --interval SECONDS
	      Use this option to specify the positive  number  of
	      seconds  between	ICMP  ECHO requests.  The default
	      value for this parameter is one second.

BUGS
       Some modern routers give a lower	 priority  to  ICMP  ECHO
       packets	than to other network traffic.	Consequently, the
       reliability of these routers reported by mtr will be  sig
       nificantly  lower  than	the  actual  reliability of these
       routers.

CONTACT INFORMATION
       For  the	 latest	 version,  see	the  mtr  web	page   at
       http://www.bitwizard.nl/mtr/.

       Subscribe  to  the  mtr	mailing	 list.	 All  mtr related
       announcements are posted to the mtr mailing list.  To sub
       scribe,	send  email  to majordomo@lists.xmission.com with
       subscribe mtr in the body of the message.  To send a  mes
       sage  to the mailing list, mail to mtr@lists.xmission.com.

       Bug reports and feature requests should be sent to the mtr
       mailing list.

SEE ALSO
       traceroute(8), ping(8).

mtr			  March 4, 1999				3

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