Huawei quidway s7700 - Configuring Basic MD VPN Functions; Establishing the Configuration Task

flowing to the public network. The multicast data flow is then switched from the Share-MDT
to the Switch-MDT. Multicast data can thus be transmitted on demand.
Users can configure the switching conditions of a Switch-MDT.
MD VPN across Multi-AS
When a VPN covers multiple ASs, it is necessary to connect VPN nodes among different ASs.
The following lists methods used by MD VPN to realize inter-AS multicast:
l VPN instance-to-VPN Instance connection method
l Multi-hop EBGP connection method
NOTE
For detailed implementation process, refer to the chapter "Multicast VPN" in the Quidway S7700 Smart
Routing Switch Feature Description - IP Multicast.
8.3 Configuring Basic MD VPN Functions
By configuring the IPv4 multicast VPN through the MD solution, you can enable the
transmission of private multicast data over a public network. In this manner, multicast data in
the private network can traverse the public network and finally reach the receiver.
8.3.1 Establishing the Configuration Task
Before configuring basic MD VPN functions, familiarize yourself with the applicable
environment, pre-configuration tasks, and required data. This can help you complete the
configuration task quickly and accurately.
Applicable Environment
To implement multicast transmission in a VPN network, ensure that the VPN network works
normally. To enable a PE to receive information from multiple VPNs, the PE needs to
simultaneously support the public network instance and the VPN instance. The public network
is responsible for communicating with Ps, and each VPN instance is responsible for
communicating with each CE.
Configure multicast VPN by using the MD solution. Set up Share-MDT to forward multicast
packets. When the multicast forwarding rate exceeds the threshold, Share-MDT is switched to
Switch-MDT.
Pre-configuration Tasks
Before configuring basic MD VPN functions, complete the following tasks:
l Configuring a unicast routing protocol
l Configuring MPLS/BGP VPN
l Configuring public network multicast
Data Preparation
To configure basic MD VPN functions, you need the following data.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 8 IPv4 Multicast VPN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
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