Filter
Top Products
Document No. 10-300090, Issue 1 9-13
IGMP
mtrace
Command Mode Privileged.
Description Traces the path from a source to a destination branch for a multicast
distribution tree. The trace follows the multicast path from the destination to
the source by passing an mtrace request packet to each hop. The responses
are unicast to the querying router by the first hop router to the source. The
mtrace command is helpful in isolating multicast routing failures.
Syntax mtrace <source> [<destination>] [<group>]
Sample Output The following example traces the path from a source (10.0.2.129) to a
destination (10.0.4.77) branch for a multicast destination tree (255.0.1.1).
# mtrace 10.0.2.129 10.0.4.177 255.0.1.1
OutIntf InIntf Port Fwd TTL
-1 10.0.6.96, 10.0.5.96 DVMRP thresh^32 0 ms
-2 10.0.5.95, 10.0.1.95 DVMRP thresh^32 1391000 ms
-3 10.0.2.63, 10.0.1.63 DVMRP thresh^32 2054500 ms
Round trip time 0 ms
Systems P550R, P580, P880, and P882.
Table 9-7. Parameters, Keywords, Arguments
Name Definition
<source> The IP address of the Multicast Capable source. This is a unicast
address that represents the beginning of the path to be traced.
<destination> The IP address of the unicast destination. If omitted, the trace
starts from the system at which the command is typed.
<group> The Multicast Address of the group address to be traced. The
default address is: 224.2.0.1. (The group used for MBONE
audio.)