Command Manual – Multicast
H3C S7500E Series Ethernet Switches
Chapter 6 Multicast Routing and Forwarding
Configuration Commands
6-11
Description
Use the mtracert command to trace the path down which the multicast traffic from a
given multicast source 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) multicast stream; otherwise
the multicast traceroute will fail.
Examples
# Trace the path down which the (6.6.6.6, 225.2.1.1) multicast traffic flows from the
multicast source to the last-hop router with the (S, G) outgoing interface 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
Total number of packets for this source-group pair: 8100
Protocol: PIM
Forwarding TTL: 0
Forwarding code: No error
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