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Man Pages


Manual Reference Pages  -  MTRACE6 (8)

NAME

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

CONTENTS

Synopsis
Description
Options
See Also
Bugs
History

SYNOPSIS

mtrace6 [-d destination] [-g gateway] [-h hops] [-i interface] [-l link] [-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 requester.

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. A 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 the query hop limit to hops. The default is 64.
-i interface
  Specifies the local interface (on a multi-homed host) for sending the trace query and for receiving responses.
-l link
  Specifies the link for the default first destination, ff02::1, of the trace query. This option is effective only when the -g option is not specified, and cannot coexist with the option. The link can be a numeric link identifier, or the interface name on the link when there is one to one mapping between links and interfaces.
-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 numerically (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 response, 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.
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