Mtracert - 3Com S7906E Command Reference Manual

mtracert

Syntax
mtracert source-address [ [ last-hop-router-address ] group-address ]
View
Any view
Default Level
1: Monitor level
Parameters
source-address: Specifies a multicast source address.
group-address: Specifies a multicast group address, in the range of 224.0.1.0 to 239.255.255.255.
last-hop-router-address: Specifies a last-hop router address, which is the IP address of the local router
by default.
Description
Use the mtracert command to trace the path down which the multicast traffic flows to the last-hop
router.
Note that if the last-hop-router-address argument is given in the command to trace the path for a
specific (S, G) multicast stream, the interface corresponding to the last-hop router address must be the
outgoing interface for the (S, G) entry; otherwise the multicast traceroute will fail.
Examples
# Trace the path down which the (6.6.6.6, 225.2.1.1) multicast traffic flows to the last-hop router with an
IP address of 5.5.5.8.
<Sysname> mtracert 6.6.6.6 5.5.5.8 225.2.1.1
Type Ctrl+C to quit mtrace facility
Tracing reverse path of (6.6.6.6, 225.2.1.1) from last-hop router (5.5.5.8) to source via
multicast routing-table
-1 5.5.5.8
Incoming interface address: 4.4.4.8
Previous-hop router address: 4.4.4.7
Input packet count on incoming interface: 17837
Output packet count on outgoing interface: 0
Total number of packets for this source-group pair: 8000
Protocol: PIM
Forwarding TTL: 0
Forwarding code: No error
-2 4.4.4.7
Incoming interface address: 6.6.6.7
Previous-hop router address: 0.0.0.0
Input packet count on incoming interface: 2
Output packet count on outgoing interface: 259
1-11