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Chapter 6

IP Multicast in a Site-to-Site VPN

Multicast Site-to-Site VPN Deployment

Figure 6-4

Multicast VPN Topology

Branch

VPN HE1

6k-core-1 RP

Internet

Firewall

Corporate

6k-core-2 RP

Branch

Primary Secondary

VPN HE2

87045

This section provides information and sample configurations for deploying Anycast RP in a WAN.

Branch and Head-End

The IP multicast configuration steps for the branch and head-end routers are as follows: Enable IP multicast routing. Enable IP PIM Sparse Mode on each interface that will receive and forward multicast traffic.

Identify the RP for the router. With Anycast RP, the address defined is the Loopback address that is duplicated on each participating Anycast RP router. (Loopback 1 - 10.6.2.1).

Branch

Following is the basic multicast configuration for Branch1.

ip multicast-routing ! interface Tunnel0 description Primary Tunnel to HE1 ip pim sparse-mode ! interface Tunnel1 description Secondary Tunnel to HE2 ip pim sparse-mode ! interface FastEthernet0/0.1 description DATA VLAN 4 encapsulation dot1Q 4 ip address 40.1.4.1 255.255.255.0 ip pim sparse-mode

!

Cisco AVVID Network Infrastructure IP Multicast Design

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