mtr  [-hvrctglspniu46]  [--help] [--version] [--report] [--report-wide]
       [--report-cycles COUNT] [--curses] [--split] [--raw] [--no-dns] [--gtk]
       [--address IP.ADD.RE.SS]   [--interval SECONDS]   [--psize BYTES  |  -s

       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.  by sending packets with purposly  low  TTLs.
       It  continues to send packets with low TTL, noting the response time of
       the intervening routers.  This allows mtr to print  the  response  per-
       centage and response times of the internet route to HOSTNAME.  A sudden
       increase in packetloss or response time is often an indication of a bad
       (or simply overloaded) link.


              Print the summary of command line argument options.


              Print the installed version of mtr.


              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 statistics 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  perfor-


       -s BYTES

       --psize BYTES

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

              If set to a negative number, every iteration will use a  differ-
              ent, random packetsize upto that number.


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


              Use this option to force mtr to display numeric IP  numbers  and
              not try to resolve the host names.

       -o fields order

       --order fields order
              Use this option to specify the fields and their order when load-
              ing mtr.
              Example: -o "LSD NBAW"


              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 for more information about GTK+.


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


              could be and could not be what you want).

       -i SECONDS

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

              Use UDP datagrams instead of ICMP ECHO.

              Use IPv4 only.

              Use IPv6 only.

       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 significantly lower than the actual reliability
       of these routers.

       For  the  latest  version,  see  the mtr web page at http://www.bitwiz-

       Subscribe to the mtr mailing list.  All mtr related  announcements  are
       posted  to  the  mtr  mailing list.  To subscribe, send email to major- with subscribe mtr in the body of the  message.
       To send a message to the mailing list, mail to

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

       traceroute(8), ping(8).

mtr                              March 4, 1999                          MTR(8)
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