MPLS and VPN Architectures, Volume II , begins with a brief refresher of the MPLS VPN Architecture. Part II describes advanced MPLS VPN connectivity including the integration ofservice provider access technologies (dial, DSL, cable, Ethernet) and a variety of routing protocols (IS-IS, EIGRP, and OSPF), arming the reader with the knowledge of how tointegrate these features into the VPN backbone. Part III details advanced deployment issues including security, outlining the necessary steps the service provider must take to protect the backbone and any attached VPN sites, and also detailing the latest security features to allow more advanced topologies and filtering. This part also covers multi-carrier MPLS VPNdeployments. Finally, Part IV provides a methodology for advanced MPLS VPNtroubleshooting.