3Com MSR 50 Series Configuration Manual page 1109

# Enable IP multicast routing on Router B, enable PIM-DM on each interface, and
enable IGMPv2 on Ethernet 1/0.
<RouterB> system-view
[RouterB] multicast routing-enable
[RouterB] interface ethernet 1/0
[RouterB-Ethernet1/0] igmp enable
[RouterB-Ethernet1/0] pim dm
[RouterB-Ethernet1/0] quit
[RouterB] interface ethernet 1/1
[RouterB-Ethernet1/1] pim dm
[RouterB-Ethernet1/1] quit
[RouterB] interface ethernet 1/2
[RouterB-Ethernet1/2] pim dm
[RouterB-Ethernet1/2] quit
# Enable IP multicast routing on Router A, and enable PIM-DM on each interface.
<RouterA> system-view
[RouterA] multicast routing-enable
[RouterA] interface ethernet 1/0
[RouterA-Ethernet1/0] pim dm
[RouterA-Ethernet1/0] quit
[RouterA] interface ethernet 1/1
[RouterA-Ethernet1/1] pim dm
[RouterA-Ethernet1/1] quit
[RouterA] interface ethernet 1/2
[RouterA-Ethernet1/2] pim dm
[RouterA-Ethernet1/2] quit
The configuration on Router C is similar to the configuration on Router A. The
specific configuration steps are omitted here.
# Use the display multicast rpf-info command to view the RPF route to Source
on Router B.
[RouterB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: Ethernet1/2, 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
As shown above, the current RPF route on Router B is contributed by a unicast
routing protocol and the RPF neighbor is Router A.
3 Configure a multicast static route
# Configure a multicast static route on Router B, specifying Router C as its RPF
neighbor to Source.
[RouterB] ip rpf-route-static 50.1.1.100 24 20.1.1.2
4 Verify the configuration
Configuration Examples 1109