tracepath  -  traces path to <destination> discovering MTU
       along this path


SYNOPSIS

       tracepath destination [ port ]


DESCRIPTION

       It traces path to <destination> discovering MTU along this
       path.  It uses UDP port <port> or some random port.

       tracepath6 is good replacement for traceroute6
              and  classic  example  of  application  Linux error
              queues.  tracepath is worse, because commercial  IP
              routers  do  not  return enough information in icmp
              error messages.  Probably,  it  will  change,  when
              they  will  be updated.  For now it uses Van Jacob­
              son's trick, sweaping a range of UDP ports to main­
              tain trace history.  using source address <source>.


WARNING

       GENERAL NOTE: all these applets, except  for  tracepath[6]
       should  be excecutabel only with CAP_NET_RAWIO capability.
       To all that I know, they are safe to  be  used  as  setuid
       root.


AUTHOR

       tracepath     was     written    by    Alexey    Kuznetsov
       <kuznet@ms2.inr.ac.ru>


BUGS

       If someone will dig out bugs, which were  fixed  after  my
       versions were cloned: PLEASE, tell me!


AVAILABILITY

       tracepath  is  part of the iputils-ss990107 package and is
       available for anonymous ftp  <ftp://ftp.inr.ac.ru/ip-rout­
       ing/iputils-ss990107.tar.gz>


SEE ALSO

       ping(8), clockdiff(8), arping(8)


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