Friday, April 1, 2011

Configure IP Multicast Routing on Cisco Router

Rendezvous Point Routers (two):

ip multicast-routing
!
interface Loopback0
ip pim sparse-mode
!
interface Loopback1
ip address 10.4.40.252 255.255.255.255
ip pim sparse-mode
!
interface Port-Channel1
ip pim sparse-mode
!
interface GigabitEthernet0/0/4
ip pim sparse-mode
!
ip pim rp-address 10.4.40.252 10
access-list 10 permit 239.1.0.0 0.0.255.255

Other Routers:

ip multicast-routing
!
interface Loopback0
ip pim sparse-mode
!
interface Port-Channel1
ip pim sparse-mode
!
interface GigabitEthernet0/0/4
ip pim sparse-mode
!
ip pim rp-address 10.4.40.252 10
ip pim register-source Loopback0
access-list 10 permit 239.1.0.0 0.0.255.255

- The access-list limits the network size the RP is responsible for.
- IP PIM sparse-mode (Protocol Independent Multicast) is enabled on all interfaces.
- Rendezvous Point (RP) should be placed close to IP Multicast sources in core.
- Two or more RPs are configured with the same IP address on loopback interfaces.

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