Inter Provider L3 VPN -- Option B

Inter Provider VPN connectivity is often translated as International VPN which are normally required by multinational enterprises. This lab follows the second most scalable Inter-Provider L3 VPN Solution called “External Multiprotocol BGP” method.

Gear Used:

GNS3 (Intel Core i3 3110M with 4 GB  RAM)

Cisco C3640-JK9O3S-M, Version 12.4(16a), used for Provider & Provider Edge Routers (PE-A, PE-B, CORE-A, CORE-B, ASBR-PE-A & ASBR-PE-B)

C2691-ADVENTERPRISEK9-M, Version 12.4(5a), used for Client End Routers (CE-1, CE-2)

NOTE: Live IP Addresses & AS numbers used in this lab are purely fictitious; any resemblance to any IP/AS living or dead is purely coincidental.

Network Diagram:

 Scenario Detail:

We have 2 sites of a client CE-1 & CE-2 in need of VPN connectivity between each other located at geographically distant locations. Client couldn’t find a single ISPs presence at both locations. So, the VPN circuit has to be established across two ISPs. What follows is the complete configuration detail.

Configuration Files:

Inter Provider L3 VPN