H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
Chapter 7 Multicast Routing and Forwarding
Configuration
7-10
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
128 by default.
Configure the maximum
number of routing entries in
the multicast forwarding table
multicast forwarding-table
route-limit limit
Optional
1000 by default.
7.3.8 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
7.4 Displaying and Maintaining Multicast Routing and
Forwarding
To do... Use the command... Remarks
View the multicast
boundary information
display multicast boundary
[ group-address [ mask | mask-length ] ]
[ interface interface-type
interface-number ]
Available in
any view