network_cmds/traceroute6.tproj/traceroute6.8

   1 .\"     $KAME: traceroute6.8,v 1.10 2004/06/06 12:35:15 suz Exp $
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  30 .\" $FreeBSD: src/usr.sbin/traceroute6/traceroute6.8,v 1.17 2008/02/10 21:06:38 dwmalone Exp $
  31 .\"
  32 .Dd May 17, 1998
  33 .Dt TRACEROUTE6 8
  34 .Os
  35 .\"
  36 .Sh NAME
  37 .Nm traceroute6
  38 .Nd "print the route IPv6 packets will take to a network node"
  39 .\"
  40 .Sh SYNOPSIS
  41 .Nm
  42 .Bk -words
  43 .Op Fl dIlnNrvU
  44 .Ek
  45 .Bk -words
  46 .Op Fl f Ar firsthop
  47 .Ek
  48 .Bk -words
  49 .Op Fl g Ar gateway
  50 .Ek
  51 .Bk -words
  52 .Op Fl m Ar hoplimit
  53 .Ek
  54 .Bk -words
  55 .Op Fl p Ar port
  56 .Ek
  57 .Bk -words
  58 .Op Fl q Ar probes
  59 .Ek
  60 .Bk -words
  61 .Op Fl s Ar src
  62 .Ek
  63 .Bk -words
  64 .Op Fl w Ar waittime
  65 .Ek
  66 .Bk -words
  67 .Ar target
  68 .Op Ar datalen
  69 .Ek
  70 .\"
  71 .Sh DESCRIPTION
  72 The
  73 .Nm
  74 utility
  75 uses the IPv6 protocol hop limit field to elicit an ICMPv6 TIME_EXCEEDED
  76 response from each gateway along the path to some host.
  77 .Pp
  78 The only mandatory parameter is the destination host name or IPv6 address.
  79 The default probe datagram carries 12 bytes of payload,
  80 in addition to the IPv6 header.
  81 The size of the payload can be specified by giving a length
  82 (in bytes)
  83 after the destination host name.
  84 .Pp
  85 Other options are:
  86 .Bl -tag -width Ds
  87 .It Fl d
  88 Debug mode.
  89 .It Fl f Ar firsthop
  90 Specify how many hops to skip in trace.
  91 .It Fl g Ar gateway
  92 Specify intermediate gateway
  93 .Nm (
  94 uses routing header).
  95 .It Fl I
  96 Use ICMP6 ECHO instead of UDP datagrams.
  97 .It Fl l
  98 Print both host hostnames and numeric addresses.
  99 Normally
 100 .Nm
 101 prints only hostnames if
 102 .Fl n
 103 is not specified, and only numeric addresses if
 104 .Fl n
 105 is specified.
 106 .It Fl m Ar hoplimit
 107 Specify maximum hoplimit, up to 255.
 108 The default is 30 hops.
 109 .It Fl n
 110 Do not resolve numeric address to hostname.
 111 .It Fl N
 112 Use a packet with no upper layer header for the probes,
 113 instead of UDP datagrams.
 114 .It Fl p Ar port
 115 Set UDP port number to
 116 .Ar port .
 117 .It Fl q Ar probes
 118 Set the number of probe per hop count to
 119 .Ar probes .
 120 .It Fl r
 121 Bypass the normal routing tables and send directly to a host
 122 on an attached network.
 123 If the host is not on a directly-connected network,
 124 an error is returned.
 125 This option corresponds to the
 126 .Dv SO_DONTROUTE
 127 socket option;
 128 it can be used to ping a local host through an interface
 129 that has no route through it
 130 (e.g., after the interface was dropped by a routing daemon).
 131 .It Fl s Ar src
 132 .Ar Src
 133 specifies the source IPv6 address to be used.
 134 .It Fl U
 135 Use UDP datagrams for the probes.
 136 This is the default.
 137 .It Fl v
 138 Be verbose.
 139 .It Fl w Ar waittime
 140 Specify the delay time between probes.
 141 .El
 142 .Pp
 143 This program prints the route to the given destination and the round-trip
 144 time to each gateway, in the same manner as traceroute.
 145 .Pp
 146 Here is a list of possible annotations after the round-trip time for each gateway:
 147 .Bl -hang -offset indent
 148 .It !N
 149 Destination Unreachable - No Route to Host.
 150 .It !P
 151 Destination Unreachable - Administratively Prohibited.
 152 .It !S
 153 Destination Unreachable - Not a Neighbour.
 154 .It !A
 155 Destination Unreachable - Address Unreachable.
 156 .It !\&
 157 This is printed if the hop limit is <= 1 on a port unreachable message.
 158 This means that the packet got to the destination,
 159 but that the reply had a hop limit that was just large enough to
 160 allow it to get back to the source of the traceroute6.
 161 This was more interesting in the IPv4 case,
 162 where some IP stack bugs could be identified by this behaviour.
 163 .El
 164 .\"
 165 .Sh RETURN VALUES
 166 The
 167 .Nm
 168 utility will exit with 0 on success, and non-zero on errors.
 169 .\"
 170 .Sh SEE ALSO
 171 .Xr ping 8 ,
 172 .Xr ping6 8 ,
 173 .Xr traceroute 8
 174 .\"
 175 .Sh HISTORY
 176 The
 177 .Nm
 178 utility first appeared in WIDE hydrangea IPv6 protocol stack kit.