Huawei AR1200 series Configuration Manual page 73

Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN
After LDP LSPs are established for the labeled BGP routes of the public network, EBGP
connections in multi-hop mode are established between PEs of different ASs to exchange VPNv4
routes.
3.10 Configuring HoVPN
HoVPN indicates a hierarchical VPN in which multiple PEs play different roles and form a
hierarchical structure. With this structure, these PEs function as one PE, and the performance
requirements for the PEs are lowered.
3.11 Configuring a Multi-VPN-Instance CE
By using OSPF multi-instance on CEs, you can implement service isolation on the LAN.
3.12 Connecting VPN and the Internet
Generally, users within a VPN can communicate only with each other, but cannot communicate
with Internet users because VPN users cannot access the Internet. If each VPN site needs to
access the Internet, configure the interconnection between the VPN and the Internet.
3.13 Configuring IP FRR of a Private Network
When multiple CEs in a VPN site are connected to the same PE, you can configure IP FRR. In
this manner, when traffic forwarding between a CE and the PE fails, the traffic is fast switched
to another link between another CE and the PE.
3.14 Configuring VPN FRR
In the networking of CE dual-homing, you can configure VPN FRR to ensure the end-to-end
VPN service fast switchover if the PE fails.
3.15 Configuring Route Reflection to Optimize the VPN Backbone Layer
Using an RR can reduce the number of MP IBGP connections between PEs. This not only reduces
the burden of PEs, but also facilitates network maintenance and management.
3.16 Configuring Route Reflection to Optimize the VPN Access Layer
If a PE and the connected CEs are in the same AS, you can deploy a BGP route RR to reduce
the number of IBGP connections between CEs and facilitate maintenance and management.
3.17 Maintaining BGP/MPLS IP VPN
This section describes how to maintain the BGP/MPLS IP VPN, which involves L3VPN traffic
checking, network connectivity monitoring, BGP connection resetting.
3.18 Configuration Examples
This section provides several configuration examples of VPN networking. In each configuration
example, the networking requirements, configuration roadmap, configuration notes,
configuration procedures, and configuration files are described.
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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