1 .\" $KAME: traceroute6.8,v 1.10 2004/06/06 12:35:15 suz Exp $
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36 .Nd "print the route IPv6 packets will take to a network node"
79 uses the IPv6 protocol hop limit field to elicit an ICMPv6 TIME_EXCEEDED
80 response from each gateway along the path to some host.
82 The only mandatory parameter is the destination host name or IPv6 address.
83 The default probe datagram carries 20 bytes of payload,
84 in addition to the IPv6 header.
85 The size of the payload can be specified by giving a length
87 after the destination host name.
92 Turn on AS# lookups for each hop encountered.
94 Turn on AS# lookups and use the given server instead of the default.
98 Specify how many hops to skip in trace.
100 Specify intermediate gateway.
103 tries to use routing headers.
105 Use ICMP6 ECHO instead of UDP datagrams.
107 Print both host hostnames and numeric addresses.
110 prints only hostnames if
112 is not specified, and only numeric addresses if
116 Specify maximum hoplimit, up to 255.
117 The default is the value of the
118 .Va net.inet6.ip6.hlim
120 (the same default used for TCP connections).
122 Do not resolve numeric address to hostname.
124 Use a packet with no upper layer header for the probes,
125 instead of UDP datagrams.
127 Set SCTP/TCP/UDP port number to
130 Set the number of probe per hop count to
133 Bypass the normal routing tables and send directly to a host
134 on an attached network.
135 If the host is not on a directly-connected network,
136 an error is returned.
137 This option corresponds to the
140 it can be used to ping a local host through an interface
141 that has no route through it
142 (e.g., after the interface was dropped by a routing daemon).
145 specifies the source IPv6 address to be used.
147 Use SCTP packets for the probes.
148 The size of probe packets must be a multiple of 4.
151 is up to 28, probe packets consist of a SHUTDOWN-ACK chunk possibly bundled
153 For larger probe packets, an INIT chunk is used.
158 used when sending probe packets.
159 The value must be a decimal integer in the range 0 to 255.
162 Use TCP segments for the probes.
164 Use UDP datagrams for the probes.
169 Specify the delay time between probes.
172 This program prints the route to the given destination and the round-trip
173 time to each gateway, in the same manner as traceroute.
175 Here is a list of possible annotations after the round-trip time for each gateway:
176 .Bl -hang -offset indent
178 Destination Unreachable - No Route to Host.
180 Destination Unreachable - Administratively Prohibited.
182 Destination Unreachable - Not a Neighbour.
184 Destination Unreachable - Address Unreachable.
186 Parameter Problem - Unrecognized Next Header Type.
188 This is printed if the hop limit is <= 1 on a port unreachable message.
189 This means that the packet got to the destination,
190 but that the reply had a hop limit that was just large enough to
191 allow it to get back to the source of the traceroute6.
192 This was more interesting in the IPv4 case,
193 where some IP stack bugs could be identified by this behaviour.
199 utility will exit with 0 on success, and non-zero on errors.
208 utility first appeared in WIDE hydrangea IPv6 protocol stack kit.