Multicast Support For Vpns - HP A8800 Configuration Manual

incoming interface. The result of the RPF check determines whether the packet will be forwarded or
discarded. The RPF check mechanism is the basis for most multicast routing protocols to implement
multicast forwarding.
For more information about the RPF mechanism, see
"Configuring IPv6 multicast routing and

Multicast support for VPNs

Multicast support for VPNs refers to multicast applied in virtual private networks (VPNs).
NOTE:
Multicast support for VPNs is not available in IPv6 networks.
Introduction to VPN instances
VPNs must be isolated from one another and from the public network. As shown in
VPN B separately access the public network through PE devices.
Figure 10 VPN networking diagram
VPN B
CE b1
CE a1
VPN A
The provider (P) device belongs to the public network. The customer edge (CE) devices belong to
•
their respective VPNs. Each CE device serves its own VPN and maintains only one set of forwarding
mechanisms.
• The provider edge (PE) devices connect to the public network and the VPNs. Each PE device must
strictly distinguish the information for different networks, and maintain a separate forwarding
mechanism for each network. On a PE device, a set of software and hardware that serve the same
network forms an instance. Multiple instances can exist on the same PE device, and an instance can
VPN A
CE b2
PE 1
Public network
"Configuring multicast routing and
forwarding."
CE a2
CE b3
PE 2
P
PE 3
12
Figure
VPN B
CE a3
VPN A
forwarding" and
10, VPN A and