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Add some more details about what traceroute6 does.

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Submitted by:	Orla McGann <orly@redbrick.dcu.ie>
Obtained from:	KAME
MFC after:	2 weeks
This commit is contained in:
David Malone 2004-06-09 12:45:51 +00:00
parent 203bcaf51e
commit 615f49ba68
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130268
1 changed files with 40 additions and 3 deletions
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43
usr.sbin/traceroute6/traceroute6.8
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@ -1,4 +1,4 @@
.\" $KAME: traceroute6.8,v 1.9 2002/08/30 03:56:20 onoe Exp $
.\" $KAME: traceroute6.8,v 1.10 2004/06/06 12:35:15 suz Exp $
.\"
.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
.\" All rights reserved.
@ -35,7 +35,7 @@
.\"
.Sh NAME
.Nm traceroute6
.Nd "print the route IPv6 packets will take to the destination"
.Nd "print the route IPv6 packets will take to a network node"
.\"
.Sh SYNOPSIS
.Nm
@ -69,6 +69,19 @@
.Ek
.\"
.Sh DESCRIPTION
.Nm
uses the IPv6 protocol hop limit field to elicit an ICMPv6 TIME_EXCEEDED
response from each gateway along the path to some host.
.Pp
The only mandatory parameter is the destination host name or IPv6 address.
The default probe datagram carries 12 bytes of payload,
in addition to the IPv6 header.
The size of the payload can be specified by giving a length
.Po in bytes
.Pc
after the destination host name.
.Pp
Other options are:
.Bl -tag -width Ds
.It Fl d
Debug mode.
@ -86,7 +99,8 @@ Normally
.Nm
prints only hostnames if
.It Fl m Ar hoplimit
Specify maximum hoplimit.
Specify maximum hoplimit, up to 255.
The default is 30 hops.
.Fl n
is not specified, and only numeric addresses if
.Fl n
@ -108,6 +122,29 @@ Be verbose.
.It Fl w Ar waittime
Specify the delay time between probes.
.El
.Pp
This program prints the route to the given destination and the round-trip
time to each gateway, in the same manner as traceroute.
.Pp
Here is a list of possible annotations after the round-trip time for each gateway:
.Pp
.Bl -hang -offset indent
.It !N
Destination Unreachable - No Route to Host.
.It !P
Destination Unreachable - Administratively Prohibited.
.It !S
Destination Unreachable - Not a Neighbour.
.It !A
Destination Unreachable - Address Unreachable.
.It !
This is printed if the hop limit is <= 1 on a port unreachable message.
This means that the packet got to the destination,
but that the reply had a hop limit that was just large enough to
allow it to get back to the source of the traceroute6.
This was more interesting in the IPv4 case,
where some IP stack bugs could be identified by this behaviour.
.El
.\"
.Sh RETURN VALUES
The