Enterprises and service providers require ubiquitous and secure connectivity to address today's mission-critical high-bandwidth applications. Many enterprises replace their traditional WANs with site-to-site and remote-access VPNs while service providers are offering managed VPN services, including virtualized network-based VPNs. The Cisco IPSec VPN Shared Port Adapter (SPA) offers next-generation encryption technology as well as a form factor designed to enable a more flexible and scalable network infrastructure. The Cisco IPSec VPN SPA delivers scalable and cost-effective VPN performance for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers. Using the Cisco 7600 Series/Catalyst 6500 Series Services SPA Carrier-400 (Cisco Services SPA Carrier-400), each slot of the Cisco Catalyst 6500 or Cisco 7600 can support up to two Cisco IPSec VPN SPAs. Although the Cisco IPSec VPN SPA does not have physical WAN or LAN interfaces, it takes advantage of the breadth of LAN and WAN interfaces of each of the platforms.