Huawei Quidway S9300

Procedure
l Run the display ip routing-table vpn-instance vpn-instance-name command on the Hub-
PE to view the routing information about VPN-in and VPN-out.
l Run the display ip routing-table command on the Hub-CE and Spoke-CEs to view the
routing information.
----End
Example
If the routing table of the VPN-in has the routes to all the Spoke sites, and the routing table of
the VPN-out has the routes to the Hub and all the Spoke sites, it means that the configuration is
successful.
In addition, Hub-CE and all the Spoke-CEs have routes to the Hub and all the Spoke sites.
3.6 Configuring Inter-AS VPN Option A
This section describes how to configure inter-AS VPN Option A.
3.6.1 Establishing the Configuration Task
3.6.2 Configuring Inter-AS VPN Option A
3.6.3 Checking the Configuration
3.6.1 Establishing the Configuration Task
Applicable Environment
If the MPLS backbone network bearing the VPN routes is across multiple ASs, you must
configure the Inter-AS VPNs.
The Inter-AS VPN Option A is convenient to implement and is suitable when the amount of the
VPNs and the VPN routes on the PE is small.
In VPN-Option A, the Autonomous System Boundary Routers (ASBRs) must support the VPN
instances and can manage VPN routes. In addition, the ASBRs must reserve special interfaces
including sub-interfaces and physical interfaces for each inter-AS VPN. Option A, therefore,
requires high performance of the ASBRs. No inter-AS configuration is needed on the ASBRs.
Pre-configuration Tasks
Before configuring inter-AS IP VPN Option A, complete the following tasks:
l Configuring IGP for MPLS backbone networks in each AS to keep IP connectivity of the
backbones in one AS
l Enabling MPLS and MPLS LDP on the PE and the ASBR
l Setting up the tunnel (LSP or MPLS TE) between the PE and the ASBR in the same AS
l Configuring the IP address of the CE interface through which the CE accesses the PE
3 BGP/MPLS IP VPN Configuration
Quidway S9300 Terabit Routing Switch
Configuration Guide - VPN
3-28 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 03 (2009-08-20)