R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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Configuring multicast VPN
Overview
Multicast VPN is a technique that implements multicast delivery in VPNs. A VPN is comprised of multiple
sites and the public network provided by the network provider. The sites communicate through the public
network. As shown in Figure 59, VPN A
comprises Site 1, Site 3 and Site 5, and VPN B comprises Site
2, Site 4 and Site 6.
Figure 59 Typical VPN networking diagram
A VPN involves the following types of devices:
• Provider (P) device—Core device in the public network. A P device does not directly connect to CE
devices.
• Provider edge (PE) device—Edge device in the public network. A PE device directly connects to one
or more customer edge (CE) devices, and processes VPN routing.
• CE device—Edge device on a customer network. A CE device can be a router, a switch, or a host,
that implements route distribution on the customer network.
As shown in Figure 60, the n
etwork that runs multicast VPN carries independent multicast services for the
public network, VPN A, and VPN B. A PE multicast device at the edge of the public network supports
multiple VPN instances, and operates as multiple independent multicast devices. Each VPN forms a
plane, and all these planes are isolated from one another. For example, in Figure 59, P
E1 supports the
public network, VPN A, and VPN B. You can regard these instances as independent virtual devices,
which are PE 1', PE 1", and PE 1'". Each virtual device works on a plane as shown in Figure 60.
VPN A
Site 1
VPN A
Site 3
VPN A
Site 5
VPN B
Site 2
VPN B
Site 4
VPN B
Site 6
PE 1
PE 2PE 3
CE 1 CE 2
CE 3
CE 4CE 5
CE 6
Public network
P