Summary
The enhanced Layer 2 VPN approach is the preferred approach for networks to extend and scale legacy Layer 2 VPN deployments, transport-oriented carriers in general, or any situation that has few VPN sites. Service providers that are building on the vision of extensible and efficient packet-based infrastructures need a deployable migration solution to maximize and protect their existing investments and revenues. Development of the new Layer 2 VPN technologies such as AToM and L2TPv3 enables the consolidation of Layer 2 and 3 networks while building the value-added IP service portfolios. |