53
[RouterA-GigabitEthernet1/0/1] quit
[RouterA] interface gigabitethernet 1/0/2
[RouterA-GigabitEthernet1/0/2] pim dm
[RouterA-GigabitEthernet1/0/2] quit
[RouterA] interface gigabitethernet 1/0/3
[RouterA-GigabitEthernet1/0/3] pim dm
[RouterA-GigabitEthernet1/0/3] quit
# Enable IP multicast routing and PIM-DM on Router C in the same way Router A is configured.
(Details not shown.)
4. Display RPF information for Source on Router B.
[RouterB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: GigabitEthernet1/0/3, 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.
5. Configure a static multicast route on Router B and specify Router C as its RPF neighbor to
Source.
[RouterB] ip rpf-route-static 50.1.1.100 24 20.1.1.2
Verifying the configuration
# Display RPF information for Source on Router B.
[RouterB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: GigabitEthernet1/0/2, 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 the following information:
The RPF route on Router B is the configured static multicast route.
The RPF neighbor of Router B is Router C.
Creating an RPF route
Network requirements
As shown in Figure 20:
PIM-DM runs on the network.
All routers on the network support IP multicast.
Router B and Router C run OSPF, and have no unicast routes to Router A.
Typically, the receiver host receives the multicast data from Source 1 in the OSPF domain.
Configure the routers so that the receiver host can receive multicast data from Source 2, which is
outside the OSPF domain.
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