Tracing A Multicast Path - H3C S5500-EI Series Operation Manual

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Operation Manual – Multicast
H3C S5500-EI Series Ethernet Switches
routing protocol. In addition, newly added downstream nodes cannot be installed to the
routing entry into the forwarding table.
If the configured maximum number of routing entries in the multicast forwarding table is
smaller than the current number, the routes in excess of the configured limit will not be
deleted immediately; instead they must be deleted by the multicast routing protocol. In
addition, newly added route entries cannot be installed to the forwarding table.
Follow these steps to configure the multicast forwarding table size:
Enter system view
Configure the maximum
number of downstream nodes
for a single route in the
multicast forwarding table
Configure the maximum
number of routing entries in
the multicast forwarding table

9.3.8 Tracing a Multicast Path

You can run the mtracert command to trace the path down which the multicast traffic
flows from a given multicast source to the last-hop router for troubleshooting purposes.
Trace a multicast path
To do...
To do...
mtracert source-address
[ [ last-hop-router-address
] group-address ]
Use the command...
system-view
multicast forwarding-table
downstream-limit limit
multicast forwarding-table
route-limit limit
Use the command...
9-10
Chapter 9 Multicast Routing and
Forwarding Configuration
Remarks
Optional
The default is 128.
Optional
The default is
1024.
Remarks
Required
Available in any view

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