This guide is a must read for any network engineer interested in IP/MPLS technologies and Carrier Ethernet Layer 2 VPN services. Discover what it takes to optimize an IP/MPLS-based VPN network's reliability, performance, and flexibility.
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Layer 2 VPN Architectures is a comprehensive guide to consolidating network infrastructures and extending VPN services. The book opens by discussing Layer 2 VPN applications utilizing both AToM and L2TPv3 protocols and comparing Layer 3 versus Layer 2 provider-provisioned VPNs.
A GRE tunnel endpoint is created on each side and configured to 'stretch' the on-premises Layer 2 network to your Private Cloud. This configuration is depicted in the following figure. To learn more about migration using L2 VPN, see Virtual Private Networks in the VMware documentation. Prerequisites for deploying the solution The diagram above depicts a typical site-to-site layer 2 bridging setup. In order to complete this setup, all of the following requirements must be met: You have two sites, each one connected to the Internet. One site will be hosting the Access Server and one site will be hosting the OpenVPN client.
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With Layer 2 VPN (L2 VPN), you can extend Layer 2 networks (VNIs or VLANs) across multiple sites on the same broadcast domain. This connection is secured with a route-based IPSec tunnel between the L2 VPN server and the L2 VPN client. A layer 2 switch can assign VLANs to specific switch ports, which in turn are in different layer 3 subnets, and therefore in different broadcast domains. VLANs allow for greater flexibility by allowing different layer 3 networks to be sharing the same layer 2 infrastructure. A GRE tunnel endpoint is created on each side and configured to 'stretch' the on-premises Layer 2 network to your Private Cloud. This configuration is depicted in the following figure. To learn more about migration using L2 VPN, see Virtual Private Networks in the VMware documentation. Prerequisites for deploying the solution The diagram above depicts a typical site-to-site layer 2 bridging setup. In order to complete this setup, all of the following requirements must be met: You have two sites, each one connected to the Internet. One site will be hosting the Access Server and one site will be hosting the OpenVPN client.