Since there's been data networking, there's been a debate between switched and routed architectures-stated in OSI terms, between performing functions at Layer 2 or Layer 3. As technologies change, the ...

Part I is a practical guide for using IPsec, MPLS Layer 3, L2TPv3, L2TPv2, AToM and SSL VPNs, so start here and then enjoy this segment. Service Provider Provisioned Site-to-Site VPNs Service provider ...

Recently, a reader wrote to tell me about the big relief he felt when he bought a Layer 3 MPLS VPN service. With such a site-to-site service, one option is to peer the WAN routers at customer sites ...