Administrator Guide
Scenario Output
output of the command displays a ‘*’
indicating that no response is received for an
mtrace request. The following message
appears when the system performs a hop-
by-hop search: “switching to hop-by-hop:”
1.1.1.1 via RPF
From source (?) to destination (?)
* * * * switching to hop-by-hop:
------------------------------------------------------------
-----
|Hop| OIF IP |Proto| Forwarding Code |Source Network/
Mask|
------------------------------------------------------------
-----
0 1.1.1.1 --> Destination
-1 1.1.1.1 PIM -
99.99.0.0/16
-2 101.101.101.102 PIM -
99.99.0.0/16
-3 2.2.2.1 PIM -
99.99.0.0/16
-4 * * * *
------------------------------------------------------------
------
If there is no response for mtrace even after
switching to expanded hop search, the
command displays an error message.
R1>mtrace 99.99.99.99 1.1.1.1
Type Ctrl-C to abort.
Querying reverse path for source 99.99.99.99 to destination
1.1.1.1 via RPF
From source (?) to destination (?)
* * * * switching to hop-by-hop:
------------------------------------------------------------
-----
|Hop| OIF IP |Proto| Forwarding Code |Source Network/
Mask|
------------------------------------------------------------
-----
0 1.1.1.1 --> Destination
-1 * * * *
------------------------------------------------------------
------
Timed out receiving responses
Perhaps no local router has a route for source, the
receiver is not
a member of the multicast group or the multicast ttl is too
low.
While traversing the path from source to
destination, if the mtrace packet exhausts
the maximum buffer size of the packet, then
NO SPACE error is displayed in the output.
You can initiate a new mtrace query by
specifying the destination as the last IP
address from the output of the previous
trace query.
R1>mtrace 99.99.99.99 1.1.1.1
Type Ctrl-C to abort.
Querying reverse path for source 99.99.99.99 to destination
1.1.1.1 via RPF
From source (?) to destination (?)
------------------------------------------------------------
-----
|Hop| OIF IP |Proto| Forwarding Code |Source Network/
Mask|
------------------------------------------------------------
-----
0 1.1.1.1 --> Destination
-1 1.1.1.1 PIM -
99.99.0.0/16
-2 101.101.101.102 PIM -
99.99.0.0/16
-3 2.2.2.1 PIM -
99.99.0.0/16
498 Multicast Features