Layer 2 VPN architectures Anthony Chan, Carlos Pignataro, Dmitry Bokotey, Wei Luo
Publisher: Cisco Press

They claim they need layer-2 virtual networks to support existing applications (like Microsoft's load balancing marvels) and rely on flooding (emulated with IP multicast) to build the remote-MAC-to-remote-IP mappings in hypervisor virtual switches. NO dynamic routing protocol support or VPN support, The firewall control plane cannot insert itself into the IP circuit and cannot provide a lot of services. Cisco Press – Optical Network Design and Implementation(2004).chm. Cisco.Press.LAN.Switching.First-Step.Jul.2004.eBook-DDU Cisco.Press.Layer.2.VPN.Architectures.Mar.2005.eBook-LiB. Cisco Press – Network Security Fundamentals.chm. Nicira's Network Virtualization Platform is way better – it has a central control plane that uses OpenFlow to distribute MAC-to-IP mapping information to individual hypervisors. Description: Covert VPN creates a network interface on the Cobalt Strike system and bridges this interface into the target's network. Cisco.Press.LAN.Switching.Fundamentals.chm=4404599. Layer 2 VPN architectures Anthony Chan, Carlos Pignataro, Dmitry Bokotey, Wei Luo Publisher: Cisco Press. Cisco Press – Layer 2 VPN Architectures.chm. Cisco.Press.Layer.2.VPN.Architectures.chm=8323657. Cisco.Press.Metro.Ethernet.rar=3677271. Cisco.Press.Metro.Ethernet.eBook-KB Cisco.Press.Mobile.IP.Technology.and.Applications.May.2005. I'm not sure if you're planning to go through the CCNP SP as well on your journey, but Layer 2 VPN Architectures from Cisco Press has definitely helped me. I wouldn't recommend the above one and would rather go with MPLS Fundamentals (by far the best MPLS book around) and Layer 2 VPNs.