Multicast Forwarding Across Unicast Subnets - HP FlexFabric 5950 series Configuration Manual

Figure 29 Creating an RPF route
Static multicast routing table on Device C
Source/Mask
192.168.0.0/24
Static multicast routing table on Device D
Source/Mask
192.168.0.0/24
Source
192.168.0.1/24
Multicast packets
As shown in
For the receiver hosts in the OSPF domain to receive multicast packets from the multicast source in
the RIP domain, you must configure Device C and Device D as follows:
•
On Device C, configure a static multicast route for the multicast source and specify Device B as
the RPF neighbor.
•
On Device D, configure a static multicast route for the multicast source and specify Device C as
the RPF neighbor.
NOTE:
A static multicast route is effective only on the multicast router on which it is configured, and will not
be advertised throughout the network or redistributed to other routers.

Multicast forwarding across unicast subnets

Routers forward the multicast data from a multicast source hop by hop along the forwarding tree, but
some routers might not support multicast protocols in a network. When the multicast data is
forwarded to a router that does not support IP multicast, the forwarding path is blocked. In this case,
you can enable multicast forwarding across two unicast subnets by establishing a tunnel between
the routers at the edges of the two unicast subnets.
Interface RPF neighbor/Mask
Vlan-int10 1.1.1.1/24
Interface RPF neighbor/Mask
Vlan-int20 2.2.2.2/24
RIP domain
Device B
Device A
Figure 29, the RIP domain and the OSPF domain are unicast isolated from each other.
OSPF domain
Device D
Vlan-int10 Vlan-int10
1.1.1.1/24 1.1.1.2/24
Device C
Static multicast route
78
Receiver
Vlan-int20
2.2.2.1/24
Vlan-int20
Receiver
2.2.2.2/24