Changing An Rpf Route - 3Com MSR 50 Series Configuration Manual

1108 C 68: M
HAPTER ULTICAST
Configuration
Examples

Changing an RPF Route

R F C
OUTING AND ORWARDING
Network requirements
PIM-DM runs in the network. All routers in the network support multicast.
■
Router A, Router B and Router C run OSPF.
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Typically, Receiver can receive the multicast data from Source through the path
■
Router A - Router B, which is the same as the unicast route.
Perform the following configuration so that Receiver can receive the multicast
■
data from Source through the path Router A - Router C - Router B, which is
different from the unicast route.
Network diagram
Figure 328 Network diagram for RPF route alteration configuration
Eth1 /1
40.1.1 .2/24
Router A
Eth 1/0
50.1.1.1 /24
Multicast static route
Configuration procedure
1 Configure interface IP addresses and enable unicast routing on each router
Configure the IP address and subnet mask for each interface as per
The detailed configuration steps are omitted here.
Enable OSPF on Router A, Router B and Router C. Ensure the network-layer
interoperation among the routers. Ensure that the routers can dynamically update
their routing information by leveraging the unicast routing protocol. The specific
configuration steps are omitted here.
2 Enable IP multicast routing, and enable PIM on each interface
ONFIGURATION
Router C
Eth1/1 Eth1 /0
40 .1 .1.1/24 20 .1 .1.2/24
PIM-DM
Eth1/2
30.1.1.2/24
Source
50 .1.1.100/24
Eth1/1
20 .1.1.1/24
Router B
Eth1/2
30.1.1.1 /24
Eth1/0
10.1.1.1/24
Receiver
10.1.1.100 /24
Figure 328.