Tag: 0 Priority: 0
Label: 15362 QoSInfo: 0x0
RelayNextHop: 0.0.0.0 Interface: Vlanif10
TunnelID: 0x10002
BkNextHop: 3.3.3.3 BkInterface:
BkLabel: 15363 SecTunnelID: 0x0
BkPETunnelID: 0x10001 BkPESecTunnelID: 0x0
3.11 Configuring Route Reflection to Optimize the VPN
Backbone Layer
This section describes how to configure BGP route reflection on the VPN backbone layer to
reflect VPNv4 routes.
3.11.1 Establishing the Configuration Task
3.11.2 Configuring the Client PE to Establish MP-IBGP Connection with the RR
3.11.3 Configuring the RR to Establish MP-IBGP Connections with All Client PEs
3.11.4 Configuring Route Reflection for BGPVPNv4 Routes
3.11.5 Checking the Configuration
3.11.1 Establishing the Configuration Task
Applicable Environment
The BGP speaker does not advertise the routes learned from IBGP to its IBGP peers. To make
a PE advertise the routes of the VPN that the PE accesses to the BGP VPNv4 peers in the same
AS, the PE must establish IBGP connections with all peers to directly exchange VPN routing
information. That is, MP-IBGP peers must establish full connections between each other. Too
many IBGP peers occupy a great amount of network resources.
The Route Reflector (RR) can solve this problem. In an AS, one device can be configured as the
RR to reflect VPNv4 routes and the other PEs and ASBR-PEs serve as the clients, which are
called client PEs. An RR can be any device such as P router, PE, and ASBR-PE.
The introduction of the RR reduces the number of MP-IBGP connections. This lightens the
burden of PEs and facilitates network maintenance and management.
Pre-configuration Tasks
Before configuring route reflection to optimize the VPN backbone layer, complete the following
tasks:
l Configuring the routing protocol for the MPLS backbone network to implement IP
interworking between the devices on the backbone network
l Establishing tunnels (LSPs or MPLS TE tunnels) between the RR and all client PEs
Data Preparation
To configure the BGP VPNv4 route reflection, you need the following data.
Quidway S9300 Terabit Routing Switch
Configuration Guide - VPN 3 BGP/MPLS IP VPN Configuration
Issue 03 (2009-08-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
3-43
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