Command Reference Guide

3Com Router 5000 Family and Router 6000 Family mtracert ● 77
Command Reference
mtracert
Purpose Use the mtracert command to trace the network path from the multicast source to
the destination receiver along Multicast Distribution Tree, according to either the
multicast kernel routing table or RPF rule to the source.
Syntax mtracert source-address [ last-hop-address ] [ group-address ]
Parameters source-address
Address of the multicast source.
last-hop-address
Unicast address, which is the starting address of path
tracing. This address must be an interface address of a
hop router. By default, it is a physical interface address
of the local router.
group-address
Address of multicast group. By default, the value is
0.0.0.0.
Example Trace the path reversely from the local hop router 18.110.0.1 to the multicast source
10.10.1.2 in weak trace mode.
<3Com> mtracert 10.10.1.2
Type Ctrl+C to abort
Mtrace from 10.10.1.2 to 18.110.0.1 via RPF
Querying full reverse path...
-1 18.110.0.1
Incoming Interface Address: 18.110.0.1
Previous-Hop Router Address: 18.110.0.2
Input packet count on incoming interface: 0
Output packet count on outgoing interface: 0
Total number of packets for this source-group pair: 0
Protocol: PIM
Forwarding TTL: 0
Forwarding Code: No error
-2 18.110.0.2
Incoming Interface Address: 11.110.0.2
Previous-Hop Router Address: 11.110.0.4
Input packet count on incoming interface: 0
Output packet count on outgoing interface: 0
Total number of packets for this source-group pair: 0
Protocol: PIM
Forwarding TTL: 0
Forwarding Code: No error
-3 11.110.0.4
Incoming Interface Address: 10.10.1.3
Previous-Hop Router Address: 0.0.0.0
Input packet count on incoming interface: 0
Output packet count on outgoing interface: 0
Total number of packets for this source-group pair: 0
Protocol: PIM
Forwarding TTL: 0
Forwarding Code: No error