[RouterA] interface GigabitEthernet 3/1/3
[RouterA-GigabitEthernet3/1/3] pim dm
[RouterA-GigabitEthernet3/1/3] quit
# Enable IP multicast routing and PIM-DM on Router C in the same way. (Details not shown.)
# Use the display multicast rpf-info command to display the RPF route to the source on Router B.
[RouterB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
VPN instance: public net
RPF interface: GigabitEthernet3/1/3, RPF neighbor: 30.1.1.2
Referenced route/mask: 50.1.1.0/24
Referenced route type: igp
Route selection rule: preference-preferred
Load splitting rule: disable
The output shows that the current RPF route on Router B is contributed by a unicast routing protocol
and the RPF neighbor is Router A.
4.
Configure a static multicast route on Router B, specifying Router C as its RPF neighbor to the
source.
[RouterB] ip rpf-route-static 50.1.1.100 24 20.1.1.2
Verify the configuration
# Use the display multicast rpf-info command to display the information about the RPF route to the source
on Router B.
[RouterB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
VPN instance: public net
RPF interface: GigabitEthernet3/1/2, RPF neighbor: 20.1.1.2
Referenced route/mask: 50.1.1.0/24
Referenced route type: multicast static
Route selection rule: preference-preferred
Load splitting rule: disable
The output shows that the RPF route on Router B has changed. It is now the configured static multicast
route, and the RPF neighbor is now Router C.
Creating an RPF route
Network requirements
PIM-DM runs in the network and all routers in the network support IP multicast. Router B and Router C run
OSPF, and have no unicast routes to Router A. Typically, the receiver can receive the multicast data from
the source 1 in the OSPF domain.
Perform the following configuration so that the receiver can receive multicast data from the source 2,
which is outside the OSPF domain.
75