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MTR(8) mtr MTR(8)
mtr - a network diagnostic tool
mtr [-hvrctglsni] [--help] [--version] [--report] [--report-cycles COUNT] [--curses]
[--split] [--raw] [--no-dns] [--gtk] [--address IP.ADD.RE.SS] [--interval SECONDS]
[--psize BYTES | -p BYTES] HOSTNAME [PACKETSIZE]
mtr combines the functionality of the traceroute and ping programs in a single network
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 percentage 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 over-
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
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.
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
Use this option to force mtr to use the curses based terminal interface (if avail-
Use this option to force mtr to display numeric IP numbers and not try to resolve
the host names.
Use this option to force mtr to use the GTK+ based X11 window interface (if avail-
able). 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
Use this option to set mtr to spit out a format that is suitable for a split-user
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.
Use this option to bind outgoing packets' socket to specific interface, so that any
packet will be sent through this interface. NOTE that this option doesn't apply to
DNS requests (which could be and could not be what you want).
Use this option to specify the positive number of seconds between ICMP ECHO
requests. The default value for this parameter is one second.
Some modern routers give a lower priority to ICMP ECHO packets than to other network traf-
fic. 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.bitwizard.nl/mtr/.
Subscribe to the mtr mailing list. All mtr related announcements are posted to the mtr
mailing list. To subscribe, send email to firstname.lastname@example.org 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 list.
mtr March 4, 1999 MTR(8)
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