Md Vpn Overview - HP FlexNetwork 7500 Series Configuration Manual

Figure 61 Multicast in multiple VPN instances
Through multicast VPN, multicast data of VPN A for a multicast group can only arrive at receiver
hosts in Site 1, Site 3, and Site 5 of VPN A. The stream is multicast in these sites and on the public
network.
The prerequisites for implementing multicast VPN are as follows:
Within each site, multicast for a single VPN instance is supported.
1.
On the public network, multicast for the public network is supported.
2.
The PE devices support multiple VPN instances as follows:
3.
Connecting with different sites through VPN instances and supporting multicast for each
VPN instance.
Connecting with the public network and supporting multicast for the public network.
Supporting information exchange and data conversion between the public network and
VPNs.
The device implements multicast VPN by using the multicast domain (MD) method. This multicast
VPN implementation is referred to as MD VPN.
The most significant advantage of MD VPN is that it requires only the PE devices to support multiple
VPN instances. There is no need to upgrade CE devices and P devices or change their original PIM
configurations. Therefore, the MD VPN solution is transparent to CE devices and P devices.

MD VPN overview

The basic MD VPN concepts are described in Table 16.
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