Dell S6100 Configuration Manual page 581

Scenario
You can issue the mtrace command
specifying the source multicast tree and
multicast group without specifying the
destination. Mtrace traces the complete path
traversing through the multicast group to
reach the source. The output displays the
destination and the first hop (-1) as 0 to
indicate any PIM enabled interface on the
node.
You invoke a weak mtrace request by
specifying only the source without specifying
the mulicast tree or multicast group
information for the source. Mtrace traces a
path towards the source by using the RPF
neighbor at each node.
Output
-4 103.103.103.3
--------------------------------------------------------------
----
R1>mtrace 103.103.103.3 1.1.1.1 226.0.0.3
Type Ctrl-C to abort.
Querying reverse path for source 103.103.103.3 via group
226.0.0.3
From source (?) to this node
--------------------------------------------------------------
---
|Hop| OIF IP
Mask|
--------------------------------------------------------------
---
0 0.0.0.0*
-1 0.0.0.0*
103.103.103.0/24
-2 2.2.2.1
103.103.103.0/24
-3 103.103.103.3
--------------------------------------------------------------
----
* - Any PIM enabled interface on this node
R1>mtrace 103.103.103.3
Type Ctrl-C to abort.
Querying reverse path for source 103.103.103.3 via RPF
From source (?) to this node
--------------------------------------------------------------
---
|Hop| OIF IP
Mask|
--------------------------------------------------------------
---
0 0.0.0.0*
-1 0.0.0.0*
103.103.103.0/24
-2 2.2.2.1
103.103.103.0/24
-3 103.103.103.3
--------------------------------------------------------------
----
* - Any PIM enabled interface on this node
R1>mtrace 103.103.103.3 1.1.1.1
Type Ctrl-C to abort.
Querying reverse path for source 103.103.103.3 to destination
1.1.1.1 via RPF
From source (?) to destination (?)
--------------------------------------------------------------
---
|Hop| OIF IP
Mask|
--------------------------------------------------------------
---
0 1.1.1.1
-1 1.1.1.1
103.103.103.0/24
-2 101.101.101.102
--> Source
|Proto| Forwarding Code |Source Network/
--> Destination
PIM -
PIM -
--> Source
|Proto| Forwarding Code |Source Network/
--> Destination
PIM -
PIM -
--> Source
|Proto| Forwarding Code |Source Network/
--> Destination
PIM -
PIM -
Multicast Features 581