Configuring Md-Vpn; Configuration Prerequisites - HP A6600 Configuration Manual

VRF-to-VRF PE interconnectivity
As shown in
boundary router (ASBR) for AS 1 and AS 2 respectively. PE 3 and PE 4 are interconnected through their
respective VPN instance and treat each other as a CE device.
Figure 71 VPN instance-VPN instance interconnectivity
In the VPN instance-to-VPN instance interconnectivity approach, a separate MD must be established
within each AS, and VPN multicast traffic between different ASs is transmitted between these MDs.
Because only VPN multicast traffic is forwarded between ASBRs, different PIM modes can run within
different ASs. However, the same PIM mode (PIM-DM, PIM-SM, or PIM-SSM) must run on all interfaces
that belong to the same VPN (including interfaces with VPN bindings on ASBRs).
Multi-hop EBGP interconnectivity
As shown in
system boundary router (ASBR) for AS 1 and AS 2 respectively. PE 3 and PE 4 are interconnected
through their respective public network instance and treat each other as a P device.
Figure 72 Multi-hop EBGP interconnectivity
Public instance
CE 1
VPN instance
In the multi-hop EBGP interconnectivity approach, only one MD needs to be established for all the ASs,
and public network multicast traffic between different ASs is transmitted within this MD.

Configuring MD-VPN

Configuration prerequisites

Before configuring MD-VPN, complete the following tasks:
Figure 71, a VPN involves AS 1 and AS 2. PE 3 and PE 4 are the autonomous system
Figure 72, a VPN network involves AS 1 and AS 2. PE 3 and PE 4 are the autonomous
PE 1' P 1 PE 3
AS 1
MTI
PE 1"
ASBR ASBR
PE 4 P 2
AS 2
MTI
MT
MD
228
PE 2'
PE 2" CE 2