173
According to the RPF principle, the device can receive SA messages that pass the filtering policy from its
static RPF peers. To share multicast source information among PIM-SM domains without changing the
unicast topology structure, configure MSDP peering relationship for the RPs of the PIM-SM domains and
configure static RPF peering relationship for the MSDP peers to share multicast source information among
the PIM-SM domains.
Figure 55 Network diagram
Device Interface IP address
IP address
Source 1 - 192.168.1.100/24
Vlan-int105 10.110.5.1/24
Source 2 - 192.168.3.100/24 Vlan-int103 10.110.3.2/24
Switch A Vlan-int101 10.110.1.1/24
Vlan-int102 10.110.2.1/24
Vlan-int105 10.110.5.2/24
Loop0 1.1.1.1/32 Vlan-int300 192.168.3.1/24
Switch B Vlan-int101 10.110.1.2/24
Vlan-int106 10.110.6.1/24
Vlan-int100 192.168.1.1/24
Vlan-int104 10.110.4.2/24
Vlan-int103 10.110.3.1/24 Switch G Vlan-int106 10.110.6.2/24
Switch C Vlan-int102 10.110.2.2/24
Vlan-int400 192.168.4.1/24
Vlan-int200 192.168.2.1/24
Vlan-int104 10.110.4.1/24
Configuration procedure
1. Configure the IP address and subnet mask for each interface as per Figure 55. (Details not shown.)
2. Configure OSPF on the switches in each AS to make sure the switches in each AS are
interoperable at the network-layer, and they can dynamically update their routing information.
(Details not shown.)
3. Enable IP multicast routing, enable PIM-SM and IGMP, and configure a PIM-SM domain border:
# Enable IP multicast routing on Switch C, enable PIM-SM on each interface, and enable IGMP on
the host-side interface VLAN-interface 200.
<SwitchC> system-view
Vlan-int103
V
l
a
n
-
i
n
t
1
0
4
Switch B
Switch A
Source 1
AS 100
PIM-SM 1
PIM-SM 3
PIM-SM 2
Loop0
Switch D Switch E
Switch F
Switch G
Source 2
Vlan-int102
Vlan-i
nt
101
Vlan-int103 Vlan-int105
Vlan-int106
Loop0
Receiver
Receiver
Loop0
BGP peers
Vlan-
i
n
t1
01
Vlan-int105
Vlan-int106
Vl
a
n-
i
n
t30
0
Vla
n
-int40
0
AS 200
V
l
a
n
-i
n
t
1
0
4
Vlan-int102
Vlan-
i
nt
20
0
Vlan-int100
Switch C
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