R211x-HP Flexfabric 11900 IP Multicast Configuration Guide

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Multicast application in VPNs
A PE or MCE device that supports multicast for VPNs does the following operations:
• Maintains an independent set of multicast forwarding mechanisms for each VPN, including the
multicast protocols, PIM neighbor information, and multicast routing table. In a VPN, the device
forwards multicast data based on the forwarding table or routing table for that VPN.
• Implements the isolation between different VPNs.
• The PE device also implements information exchange and data conversion between the public
network and VPN instances.
As shown in Figure 10, w
hen a multicast source in VPN A sends a multicast stream to a multicast group,
only the receivers that belong to both the multicast group and VPN A can receive the multicast stream.
The multicast data is multicast both in VPN A and on the public network.