TCPIP$UCP_HELP.HLB  —  traceroute  FLAGS
    -A                   Looks up the AS-number (Autonomous System)
                         for each hop's network address at the whois
                         server specified by the -h option.

    -a                   If the destination host has multiple
                         addresses, traceroute probes all addresses
                         if this option is set. Normally only the
                         first address as returned by the resolver is
                         attempted.

    -c stoptime          Specifies a delay (in seconds) to pause
                         between probe packets. This may be necessary
                         if the final destination is a router that
                         does not accept undeliverable packets in
                         bursts.

    -f                   Disables IP fragmentation. If the given
                         packetsize is too big to be handled
                         unfragmented by a machine along the route,
                         a "fragmentation needed" status is returned
                         and the indicator !F is printed. If a gate-
                         way returns the value of the proper MTU size
                         to be used, traceroute decreases the packet
                         size automatically to this new value. If the
                         proper MTU size is not returned, traceroute
                         chooses a shorter packet size.

    -g gateway           Enables the IP LSRR (Loose Source Record
                         Route) option. This is useful for asking
                         how somebody else, at the specified gateway,
                         reaches a particular target.

    -h server            Specifies the name or IP address of the
                         whois server that is contacted for the AS-
                         number lookup, if the -A option is given.

    -i initial_ttl       Sets the starting time-to-live value to
                         initial_ttl, to override the default value
                         of 1. Effectively this skips processing for
                         those intermediate hosts that are less than
                         initial_ttl hops away.

    -k                   Keeps the connection to the whois server
                         permanently open. This makes lookups
                         considerably quicker, because connection
                         setup for each individual lookup is not
                         necessary. However, all whois servers do not
                         support this feature.

    -l                   Prints the value of the ttl field in each
                         received packet (this can be used to help
                         detect asymmetric routing).

    -m max_ttl           Sets the max time-to-live (max number of
                         hops) used in outgoing probe packets.
                         The default is 30 hops, which is the same
                         default used for TCP connections.

    -N                   Displays the network name for each hop.
                         If a BIND resolver cannot be reached,
                         network names are retrieved just from the
                         /etc/networks file.

    -n                   Prints hop IP addresses numerically rather
                         than both symbolically and numerically. This
                         saves a nameserver address-to-name lookup
                         for each gateway found on the path. It also
                         prevents a reverse lookup for numeric dotted
                         quad addresses given on the command line
                         (destination host, or -g gateway addresses).

    -p port              Sets the base UDP port number used in
                         probes (default is 33434). The traceroute
                         command presumes that nothing is listening
                         on UDP ports base to base+nhops-1 at
                         the destination host (so an ICMP "port
                         unreachable" message is returned to
                         terminate the route tracing). If another
                         process is listening on a port in the
                         default range, use this option to pick an
                         unused port range.

    -Q maxquit           Stops probing this hop after maxquit
                         consecutive timeouts are detected. The
                         default value is 5. Useful in combination
                         with -S if you have specified a big nqueries
                         probe count.

    -q nqueries          Sets the number of probes launched at each
                         ttl setting (default is 3).

    -r                   Bypasses the normal routing tables and sends
                         directly to a host on an attached network.
                         If the host is not on a directly-attached
                         network, an error is returned. This option
                         can be used to ping a local host through an
                         interface that has no route through it (for
                         example, after the interface was dropped by
                         routed(8) or gated(8)).

    -S                   Prints a per-hop minimum/average/maximum
                         rtt (round-trip time) statistics summary.
                         This suppresses the per-probe rtt and ttl
                         reporting. For better statistics you need to
                         increase the default nqueries probe count.
                         See also the -Q option.

    -s source_addr       Uses the following IP address (which must
                         be given as an IP number, not a hostname)
                         as the source address in outgoing probe
                         packets. On hosts with more than one IP
                         address, use this option to force the source
                         address to be something other than the IP
                         address of the interface on which the probe
                         packet is sent. If the IP address is not one
                         of this machine's interface addresses, an
                         error is returned and nothing is sent.

    -t tos               Sets the type-of-service in probe packets
                         to the following value (default zero).
                         The value must be a decimal integer in
                         the range 0 to 255. Use this option to
                         determine if different types-of-service
                         result in different paths. Not all values
                         of TOS are legal or meaningful. See the IP
                         specification for definitions. Useful values
                         are probably -t 16 (low delay) and -t 8
                         (high throughput).

    -v                   Produces verbose output. Lists any received
                         ICMP packets other than "time exceeded" and
                         "unreachable".

    -w waittime          Sets the time (in seconds) to wait for
                         a response to a probe. The default is 3
                         seconds.
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