Configuring IP Multicasting and Multimedia Services
B-2
117355-C Rev 00
mtrace
The
mtrace
command allows you to trace the branch of a multicast tree from a
source to a receiver for a particular multicast group. Each branch of the tree is a
data path consisting of multiple hops. The
mtrace
command displays statistics
about packet rates and losses for each hop along the path.
To display statistical information, enter the
mtrace
command at the Technician
Interface prompt as follows:
mtrace
[
<options>
]
<source> <receiver>
[
<group>
]
<options>
= [
-e
<extra_hops>
|
-g
<gateway>
|
-i
<if_addr>
|
-M
|
-m
<max_hops>
|
-q
<nqueries>
|
-r
<resp_dest>
|
-s
|
-S
<statint>
|
-t
<ttl>
|
-U
|
-v
|
-w
<wait>
]
Table B-1
explains the meanings of each
mtrace
command option.
Table B-1. mtrace Options
Option Meaning
-e
<extra_hops>
Attempt to trace extra hops past a nonresponding router. The
<extra_hops>
value is an integer.
-g
<gateway>
Send the trace query via a unicast packet directly to the multicast
router
<gateway>
that you specify.
-i
<if_addr>
Use
<if_addr>
as the local interface address for sending the
trace query and as the default address for the receiver and the
response destination. The value of
<if_addr>
is an IP address in
dotted-decimal notation.
-M
Request the response using a multicast address.
-m
<max_hops>
Set the maximum number of hops that are traced from the
receiver back to the source to the integer you specify. The default
<max_hops>
value is 32.
-q
<nqueries>
Set the maximum number of query attempts to the integer you
specify. The default
<nqueries>
value is 3.
-r
<resp_dest>
Send the trace response to a host (that is, the response
destination) other than to the host on which
mtrace
is running, or
to a multicast address other than the one registered for this
purpose (224.0.1.32).
-s
Print a short-form report including only the multicast path, not the
packet rate and loss statistics.
(continued)
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