Add some more details about what traceroute6 does.
Submitted by: Orla McGann <orly@redbrick.dcu.ie> Obtained from: KAME MFC after: 2 weeks
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=130268
@ -1,4 +1,4 @@
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.\" $KAME: traceroute6.8,v 1.9 2002/08/30 03:56:20 onoe Exp $
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.\" $KAME: traceroute6.8,v 1.10 2004/06/06 12:35:15 suz Exp $
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.\"
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.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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.\" All rights reserved.
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@ -35,7 +35,7 @@
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.\"
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.Sh NAME
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.Nm traceroute6
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.Nd "print the route IPv6 packets will take to the destination"
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.Nd "print the route IPv6 packets will take to a network node"
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.\"
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.Sh SYNOPSIS
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.Nm
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@ -69,6 +69,19 @@
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.Ek
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.\"
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.Sh DESCRIPTION
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.Nm
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uses the IPv6 protocol hop limit field to elicit an ICMPv6 TIME_EXCEEDED
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response from each gateway along the path to some host.
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.Pp
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The only mandatory parameter is the destination host name or IPv6 address.
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The default probe datagram carries 12 bytes of payload,
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in addition to the IPv6 header.
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The size of the payload can be specified by giving a length
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.Po in bytes
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.Pc
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after the destination host name.
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.Pp
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Other options are:
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.Bl -tag -width Ds
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.It Fl d
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Debug mode.
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@ -86,7 +99,8 @@ Normally
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.Nm
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prints only hostnames if
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.It Fl m Ar hoplimit
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Specify maximum hoplimit.
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Specify maximum hoplimit, up to 255.
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The default is 30 hops.
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.Fl n
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is not specified, and only numeric addresses if
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.Fl n
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@ -108,6 +122,29 @@ Be verbose.
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.It Fl w Ar waittime
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Specify the delay time between probes.
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.El
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.Pp
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This program prints the route to the given destination and the round-trip
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time to each gateway, in the same manner as traceroute.
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.Pp
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Here is a list of possible annotations after the round-trip time for each gateway:
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.Pp
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.Bl -hang -offset indent
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.It !N
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Destination Unreachable - No Route to Host.
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.It !P
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Destination Unreachable - Administratively Prohibited.
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.It !S
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Destination Unreachable - Not a Neighbour.
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.It !A
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Destination Unreachable - Address Unreachable.
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.It !
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This is printed if the hop limit is <= 1 on a port unreachable message.
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This means that the packet got to the destination,
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but that the reply had a hop limit that was just large enough to
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allow it to get back to the source of the traceroute6.
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This was more interesting in the IPv4 case,
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where some IP stack bugs could be identified by this behaviour.
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.El
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.\"
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.Sh RETURN VALUES
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The
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