Configuring Inter-As Vpn Option A; Establishing The Configuration Task - Huawei Quidway S9300 Configuration Manual
Terabit routing switch
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- Configuration manual - network management (630 pages) ,
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- Configuration manual - multicast (262 pages)
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3 BGP/MPLS IP VPN Configuration
Procedure
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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:
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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.
Run the display ip routing-table command on the Hub-CE and Spoke-CEs to view the
routing information.
Configuring IGP for MPLS backbone networks in each AS to keep IP connectivity of the
backbones in one AS
Enabling MPLS and MPLS LDP on the PE and the ASBR
Setting up the tunnel (LSP or MPLS TE) between the PE and the ASBR in the same AS
Configuring the IP address of the CE interface through which the CE accesses the PE
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Quidway S9300 Terabit Routing Switch
Configuration Guide - VPN
Issue 03 (2009-08-20)
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