MPLS VPN services

• connection less service:
• VPN connection less network don't need the tunnels & encryption for network privacy.
• Centralized services:
• VPNs in layer 3 allows the targeted services to  a group of users which are represented by VPN.
•  Scalability:
• Security:
• MPLS VPN offer same level security as connection-oriented VPNs.
• Easy to create:
• MPLS VPNs are connection less, no need of specific point-to-point connection maps or topologies are required.
• So it is easy for customers to create new VPNs & user community.
• Flexible Addressing:
• Most of customers use private address spaces.
• MPLS VPNs allow customers to continue to use their present address space without NAT.
• A NAT is required only if  2 vpns with overlapping address spaces want to communicate.
• this enable customer use their own private address in freely in public ip network.
• Integrated Class of service (COS) support:
• cos provides performance & policy implementation

VRF contain :

• ip routing table
• CEF table
• set of interfaces that use the cef forwarding table
• set of rules & routing protocol parameters to control the information in the routing tables