VPN (Virtual Private Network)
With today’s virtual communication technology, one organization could use some form of VPN (Virtual Private Network) to provide private and secure site-to-site connection.

Using a VPN connection between two locations could ride over public network (i.e. The Internet) while keep maintaining secure or private connection. This is done by creating a logical or virtual connection between the locations that ride over a physical circuit.

There is a technology to set such connection.  MPLS –

MPLS is an OSI Layer-2/3 VPN approach which uses a dedicated point-to-point circuit between organization sites through its Internet Solutions Provider (ISP). Unlike previous Dedicated Circuit network, MPLS uses the ISP public network that ride over ISP IP-based network devices without dealing with the customer IP information. In other words, an MPLS approach is somewhat between the Dedicated Circuit approach and an IPS VPN approach.

Generally speaking, an ISP network will handle the VPN aspect and use the ISP public network securely and privately; which will be transparent to the organization’s (the ISP customer) sites. Using an MPLS, site-to-site connection is pretty much like the previous dedicated site-to-site connection between locations from the organization perspective.


What is Multiprotocol Label Switching (MPLS)?

Multi Protocol Label Switching (MPLS) is an Internet Engineering Task Force (IETF) initiative designed to improve the speed, efficiency and manageability of traffic flow across IP-based networks. MPLS combines the traffic engineering capabilities of Layer 3 routing with the speed benefits of Layer 2 switching. MPLS is used in the creation of any-to-any Virtual Private Networks which need to be able to prioritize certain classes of traffic (e.g. delay-sensitive over non-delay-sensitive), differentiate levels of performance for that traffic, and deliver SLA-assured levels of bandwidth.

Why do I need Multiprotocol Label Switching (MPLS)?

MPLS is rapidly emerging as the VPN solution of choice for medium to large multi-site enterprises for the simple reason it offers so may inherent benefits over other comparable technologies.

  • High Reliability 
    MPLS VPNs are extremely resilient due to the fully meshed virtual cloud over which information is carried. If, for example, one link in this cloud fails, traffic is automatically redirected over another path.
  • Access Independence
    MPLS can be integrated seamlessly over any existing infrastructure, such as IP, Frame Relay, ATM, or Ethernet. Subscribers with differing access links can be aggregated on an MPLS edge without changing their current environments, as MPLS is independent of access technologies.
  • High Bandwidth
    MPLS makes high bandwidth available cost effectively. Moreover, this bandwidth can easily be turned on and off, as requirements dictate ensuring that any investment in your network is future-proof.
  • Manageability
    MPLS supports traffic engineering (ability to differentiate levels of service and prioritize delay-sensitive traffic), and Quality of Service (QoS) capabilities which makes it the perfect transport technology for converged (voice and video) networks.

What is Private IP?

Private IP (PIP) service provides customers with the ability to connect two or more locations using IP connectivity. Verizon’s Network-based Private IP service offering uses MPLS (Multiprotocol Label Switching) technology; the nature of which allows “any-to-any” connectivity and enables the customer to select a quality-of service as well as a class-of service based on their specific applications. The customer connects via a circuit to the MPLS network at the Provider Edge Router (PE). The PE represents the edge of the Verizon network.