No. Data
1 To configure the VPN instance on the PE and the ASBR, you need the following
data:
l Name of the VPN instance
l (Optional) Description of the VPN instance
l RD, VPN target attribute of the VPN instance
l (Optional) Routing policy
l (Optional) Tunnel policy
l (Optional) Maximum number of route permitted in a VPN instance
2
IP address of the PE interface connected with the PE
3 AS number of the PE
4 IP addresses of the interfaces connected the ASBRs
5 Routing protocol configured between the PE and the CE: static routes, RIP, OSPF,
IS-IS and BGP
6 IP addresses and interfaces setting up the IBGP peer between the PE and the ASBR
3.6.2 Configuring Inter-AS VPN Option A
The VPN instance configured on a PE is used to access a CE, and the VPN instance configured
on an ASBR is used to access the peer ASBR.
Context
Inter-AS VPN Option A is easy to deploy. When the amount of the VPNs and the VPN routes
on the PE is small, this solution can be adopted.
The configurations of the inter-AS VPN Option A are as follows:
Procedure
Step 1 3.4 Configuring Basic BGP/MPLS IP VPN on each AS
Step 2 Configuring ASBR by considering the peer ASBR as its CE
Step 3 Configuring VPN instances for the PE and the ASBR separately
The VPN instance for PE is used to access CE; that for ASBR is used to access its peer ASBR.
NOTE
In inter-AS VPN Option A mode, for the same VPN, the VPN targets of ASBR and the PE VPN instance
must be matched in an AS. This is not required for the PEs in different ASs.
----End
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
126
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