Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
Chapter 8 Multicast Routing and Forwarding
Configuration
8-10
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:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Configure the maximum
number of downstream
nodes for a single route in
the multicast forwarding
table
multicast
forwarding-table
downstream-limit limit
Optional
The default is 128.
Configure the maximum
number of routing entries
in the multicast forwarding
table
multicast
forwarding-table
route-limit limit
Optional
In the default mode and
MCE mode, the system
default is 512; in the
dual-protocol stack mode,
the system default is 256.
8.3.8 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.
To do…
Use the command…
Remarks
Trace a multicast path
mtracert
source-address
[ [
last-hop-router-address
]
group-address
]
Required
Available in any view