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MTRACE6(8)		  BSD System Manager's Manual		    MTRACE6(8)

NAME
     mtrace6 - print IPv6 multicast path from a source to a receiver

SYNOPSIS
      [-d destination] [-g gateway] [-h hops] [-i interface] [-m maxhops] [-n]
      [-r response_addr] [-w waittime] source group

DESCRIPTION
     mtrace6 utilizes a tracing feature implemented in multicast routers that
     is accessed via an extension to the MLD protocol. A trace query is passed
     hop-by-hop along the reverse path from the destination to the source,
     collecting hop addresses, packet counts, and routing error conditions
     along the path, and then the response is returned to the requestor.

OPTIONS
     -d destination
	     Specifies the multicast receiver that the query wants to trace.
	     It is the host running mtrace6 by default.

     -g gateway
	     Send the trace query via unicast directly to the multicast router
	     gateway. The unicast router must be the last-hop router on the
	     path from the intended source to the receiver.  gateway can also
	     be a multicast address that the last hop router joins.

     -h hops
	     Set hops to the IPv6 hop limit field of query packets. The de-
	     fault is 64.

     -i interface
	     Specifies the local interface (on a multi-homed host) for sending
	     the trace query and as the default for the receiver and the re-
	     sponse destination.

     -m maxhops
	     Set to maxhops to the maximum number of hops that will be traced
	     from the receiver back toward the source. The default is 127
	     hops.

     -n	     Print hop addresses numerically rather than symbolically and nu-
	     merically (saves a nameserver address-to-name lookup for each
	     router found on the path).

     -r response_addr
	     Specify the host that the trace response sends to.	 By default,
	     the response will send to the host running mtrace6.

     -w waittime
	     Set the time to wait for a trace response to waittime seconds.
	     The default is 3 seconds.

SEE ALSO
     pim6dd(8),	 pim6sd(8),  mtrace(8)

BUGS
     Multicast trace for IPv6 is experimental. MLD types for query and re-
     sponse, and packet format are not officially defined.

     waittime specified by the -w option is currently meaningless.

HISTORY
     The mtrace6 command first appeared in WIDE/KAME IPv6 protocol stack kit.

 KAME				 Sep 12, 1999				     1

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