
hop

        The 'hop' commands are used to test the connectivity of the
        network.

        hop check [-n] <host>
          Initiate a hop check session to the specified host.  This uses a
          series of UDP "probe" packets with increasing IP time-to-live
          (TTL) fields to determine the sequence of gateways in the path to
          the specified destination.  This function is patterned after the
          UNIX 'traceroute' facility.  If the -n option is used, no DNS
          lookups are done, so no names are listed for each hop.

          ICMP message tracing should be turned off before this command is
          executed (see the 'icmp trace' command).

          Each line of the hop check report provides the name or IP address
          of the host answering the "probe", then the round-trip times in
          ms (or *** if no answer was received in <maxwait> seconds).  The
          hop session is finished when certain ICMP response packets are
          received.  "Unreachable port" is the normal final message.  Others
          will result in a code being printed in place of the rtt in ms:
          !N = Net unreachable, !H = Host unreachable, !P = Protocol unreach.
          !F = Fragmentation needed, !S = Route failure, !A = Admin denied,
          !? = some other result, deemed non-final so hop-check continues.


        hop maxttl [<hops>]                                   Default: 30
          Display or set the maximum TTL value to be used in hop check
          sessions.  This effectively bounds the radius of the search.


        hop maxwait [<seconds>]                                Default: 5
          Display or set the maximum interval that a hop check session will
          wait for responses at each stage of the trace.


        hop queries [<count>]                                  Default: 3
          Display or set the number of UDP probes that will be sent at each
          stage of the trace.


        hop trace [on | OFF]                                 Default: off
          Display or set the flag that controls the display of additional
          information during a hop check session.


