There is widespread customer and industry interest in the deployment and use of IP based virtual private networks (VPN).  An IP VPN can be defined as the emulation of a private network facility across a shared IP based network infrastructure. The goal is to provide the same set of services that are provided to the user in the private network over the VPN. There may be many distinct types of VPNs,reflecting the wide variety of communication needs of customers. Customers can use their own equipment to provide the functionality needed for a VPN, an ISP can provide this service, or it may be a cooperative combination of functionality provided by customer equipment and ISP services. There was a general consensus on the mailing list that the problem is relevant and that there is a need for a forum for discussing them. We feel there is a need for a working group to work on defining the requirements, framework, architecture, service interface and requirements for mechanisms to implement VPN's. The goal of the BOF is:    - Agree on the VPN models the group should define: CPE based, ISP based and a hybrid model.    - Agree on the services these models provide: Routing & Addressing, Security, Traffic Engineering and VPN Management (Membership discovery, determination, and enrollment)    - Agree on a working group charter and the documents the working group should produce initially- Requirements, Framework and Architecture.