From: Michael Snyder (msnyder@revolutioncomputer.com)
Date: Sat Feb 28 2004 - 14:13:43 GMT-3
I've been doing practice labs for three years now and just found the
multicast commands of mstat, mrinfo, and mtrace.  This gets depressing
at times.  On a daily basis I'll mistype a command and find a new
command I've never thought about before.
Thought I have seen mtrace before, just about forgot about it.
Any idea what packet mtrace uses?  I can see the requirement now, apply
an access list and don't block mtrace traffic :) 
R7#mtrace 136.10.1.1
Type escape sequence to abort.
Mtrace from 136.10.1.1 to 136.10.56.7 via RPF
From source (?) to destination (?)
Querying full reverse path...
 0  136.10.56.7
-1  136.10.56.7 PIM  [136.10.1.0/24]
-2  136.10.56.6 PIM  [136.10.1.0/24]
-3  136.10.100.2 PIM  [136.10.1.0/24]
-4  136.10.12.1 PIM  [136.10.1.0/24]
-5  136.10.1.1
R7#
R7#
R7#mstat 136.10.7.7 136.10.1.1
Type escape sequence to abort.
Mtrace from 136.10.7.7 to 136.10.1.1 via RPF
From source (?) to destination (?)
Waiting to accumulate statistics......
Results after 10 seconds:
  Source        Response Dest    Packet Statistics For     Only For
Traffic
136.10.7.7    136.10.7.7    All Multicast Traffic     From 136.10.7.7
     |       __/  rtt 103  ms   Lost/Sent = Pct  Rate     To 0.0.0.0
     v      /     hop 68   ms   ---------------------
--------------------
136.10.7.7
136.10.56.7     ?
     |     ^      ttl   0
     v     |      hop -59  ms    0/0 = --%      0 pps    0/0 = --%  0
pps
136.10.56.6
136.10.100.6    ?
     |     ^      ttl   1
     v     |      hop 46   ms    0/0 = --%      0 pps    0/0 = --%  0
pps
136.10.100.2
136.10.12.2     ?
     |     ^      ttl   2
     v     |      hop 12   ms    -2/0 = --%      0 pps    0/0 = --%  0
pps
136.10.12.1     ?
     |      \__   ttl   3
     v         \  hop 35   ms        0         0 pps           0    0
pps
136.10.1.1      136.10.7.7
  Receiver      Query Source
R7#
R7#
R7#mrinfo
136.10.56.7 [version  12.2] [flags: PMA]:
  136.10.56.7 -> 136.10.56.6 [1/0/pim]
  136.10.56.7 -> 136.10.56.5 [1/0/pim]
  136.10.7.7 -> 0.0.0.0 [1/0/pim/querier/leaf]
R7#mrinfo 136.10.6.6
136.10.6.6 [version  12.2] [flags: PMA]:
  0.0.0.0 -> 0.0.0.0 [1/0/pim/disabled/down/leaf]
  136.10.56.6 -> 136.10.56.5 [1/0/pim/querier]
  136.10.56.6 -> 136.10.56.7 [1/0/pim/querier]
  136.10.6.6 -> 0.0.0.0 [1/0/pim/querier/leaf]
  136.10.100.6 -> 136.10.100.2 [1/0/pim]
R7#mrinfo 136.10.5.5
136.10.5.5 [version  12.2] [flags: PMA]:
  136.10.56.5 -> 136.10.56.7 [1/0/pim]
  136.10.56.5 -> 136.10.56.6 [1/0/pim]
  136.10.5.5 -> 0.0.0.0 [1/0/pim/querier/leaf]
  136.10.100.5 -> 136.10.100.2 [1/0/pim]
R7#mrinfo 136.10.2.2
136.10.2.2 [version  12.2] [flags: PMA]:
  136.10.2.2 -> 0.0.0.0 [1/0/pim/querier/leaf]
  136.10.100.2 -> 136.10.100.6 [1/0/pim/querier]
  136.10.100.2 -> 136.10.100.5 [1/0/pim/querier]
  136.10.12.2 -> 136.10.12.1 [1/0/pim]
R7#
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