Multicast Forwarding Over Gre Tunnels - 3Com S7906E Configuration Manual

[SwitchB] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: Vlan-interface102, RPF neighbor: 30.1.1.2
Referenced route/mask: 50.1.1.0/24
Referenced route type: multicast static
Route selection rule: preference-preferred
Load splitting rule: disable
[SwitchC] display multicast rpf-info 50.1.1.100
RPF information about source 50.1.1.100:
RPF interface: Vlan-interface101, 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
As shown above, the RPF routes to Source 2 exist on Switch B and Switch C. The source is the
configured static route.

Multicast Forwarding over GRE Tunnels

Network requirements
Multicast routing and PIM-DM are enabled on Switch A and Switch C. Switch B does not support
multicast.
OSPF is running on Switch A, Switch B, and Switch C.
Perform the following configurations so that Receiver can receive the multicast data from Source.
Network diagram
Figure 1-7 Network diagram for configuring multicast forwarding over a GRE tunnel
Configuration procedure
1) Configure IP addresses
Configure the IP address and mask for each interface as per
steps are omitted here.
2) Configure a GRE tunnel
# Create Tunnel 0 on Switch A and configure the IP address and mask for the interface.
<SwitchA> system-view
Figure
1-18
1-7. The detailed configuration