Black Box LR1102A-T1/E1 - Manual (Page 116)

Black Box LR11xx Series Router Configurations Guide
118
Maximum hops is set to 32 and TTL is set to 127 in all mtrace packets as default.
For mtrace to work:
„
IGMP must be enabled in the router
„
IGMP should be enabled on at least one interface.
21.1.2 mtrace Example
Traceroute using mtrace from 192.168.0.0 to 192.168.2.22 through group 225.254.254.254
Blackbox> mtrace 192.168.0.0 192.168.2.22 239.254.254.254
mtrace from 192.168.2.0 to 192.168.2.22 through group 225.254.254.254
Querying full reverse path...
1 192.168.2.15 PIM thresh^ 0 0 ms
2 192.168.2.7 PIM thresh^ 0 2 ms
3 192.168.2.5 PIM thresh^ 0 674 ms
4 192.168.2.3 PIM thresh^ 0 673 ms
5 192.168.2.2 PIM thresh^ 0 674 ms
6 192.168.2.1 PIM thresh^ 0 673 ms
Where in the line 4 192.168.2.3 PIM thresh^ 0 673 ms :
192.168.2.3 is the intermediate router 4 hops away from the destination.
Multicast Protocol in use on this hop and TTL Threshold.
673 ms is the time taken to trace to be forwarded between hops.