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

1110 C 68: M
HAPTER ULTICAST

Creating an RPF Route

R F C
OUTING AND ORWARDING
# Use the display multicast rpf-info command to view the information about
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: Ethernet1/1, 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 route on Router B has changed. It is now the configured
multicast static route, and the RPF neighbor is now Router C.
Network requirements
PIM-DM runs in the network and all routers in the network support IP
■
multicast.
Router B and Router C run OSPF, and have no unicast routes to Router A.
■
Typically, Receiver can receive the multicast data from Source 1 in the OSPF
■
domain.
Perform the following configuration so that Receiver can receive multicast data
■
from Source 2, which is outside the OSPF domain.
Network diagram
Figure 329 Network diagram for creating an RPF route
Router A
Eth1 /1
30 .1 .1.2/24
Eth1/0
50.1.1 .1/24
Source 2
50.1.1 .100 /24
Multicast static route
Configuration procedure
1 Configure the interface IP addresses and unicast routing protocol for 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 B and Router C. Ensure the network-layer interoperation
among the routers. Ensure that the routers can dynamically update their routing
ONFIGURATION
PIM-DM
OSPF domain
Router B
Eth1/2
30 .1 .1.1/24
Eth1 /1
20 .1 .1.2/24
Eth1/0
40 .1.1.1/24
Source 1
40.1.1 .100 /24
Router C
Eth1 /1
20.1.1 .1/24
Eth1/0
10.1.1.1 /24
Receiver
10 .1.1.100/24
Figure 329.