Your business must be connected in order to compete in the global marketplace. Employees need to know that their company's network is accessible at any time, from any place. A Virtual Private Network (VPN) accomplishes this by utilizing remote connectivity technologies that combine existing internal networks with the Internet to securely communicate information. Building a Virtual Private Network is your key to designing, implementing, and securing a fully connected network that meets your business needs.

IPSec VPN Design consists of three main sections. The first section provides a comprehensive introduction to the IPSec protocol, including IPSec Peer Models. This section also includes an introduction to site-to-site, network-based, and remote access VPNs. The second section is dedicated to an analysis of IPSec VPN architecture and proper design methodologies. Peer relationships and fault tolerance models and architectures are examined in detail. Part three addresses enabling VPN services, such as performance, scalability, packet processing, QoS, multicast, and security. This book also covers the integration of IPSec VPNs with other Layer 3 (MPLS VPN) and Layer 2 (Frame Relay, ATM) technologies; and discusses management, provisioning, and troubleshooting techniques. Case studies highlight design, implementation, and management advice to be applied in both service provider and enterprise environments.

Multiprotocol Label Switching (MPLS) provides the mechanisms to perform label switching, which is an innovative technique for high-performance packet forwarding. This book provides an in-depth study of MPLS technology, including MPLS theory and configuration, network design issues, and case studies. The MPLS/VPN architecture and all of its mechanisms are explained with configuration examples and suggested deployment guidelines. MPLS and VPNs provides the first in-depth discussion particular to Ciscos MPLS architecture. Multiprotocol Label Switching and Virtual Private Networks covers MPLS theory and configuration, network design issues, and case studies as well as one major MPLS application: MPLS-based VPNs. The MPLS/VPN architecture and all of its mechanisms are explained with configuration examples, suggested design and deployment guidelines, and extensive case studies.