MPLS over Generic Routing Encapsulation (MPLSoGRE) is a technique used to tunnel Multiprotocol Label Switching (MPLS) packets over non-MPLS networks. This method encapsulates MPLS packets inside GRE tunnels, creating virtual point-to-point links across networks that do not natively support MPLS.
How MPLSoGRE Works
• Encapsulation: MPLSoGRE encapsulates MPLS packets within GRE packets. The outer GRE packet provides the necessary routing information to traverse the non-MPLS network, while the inner MPLS packet remains intact.
• Tunneling: This encapsulation allows MPLS packets to be transmitted over IP networks, effectively extending MPLS capabilities across different network segments.
• Virtual Links: By creating these virtual links, MPLSoGRE enables seamless connectivity and MPLS functionality across diverse network infrastructures.
Practical Use Cases of MPLSoGRE
1. Interconnecting Data Centers: MPLSoGRE is used to connect multiple data centers over an IP backbone, allowing for consistent MPLS services and policies across geographically dispersed locations.
2. Service Provider Networks: Service providers use MPLSoGRE to extend MPLS services to customers over existing IP networks, facilitating the delivery of MPLS-based VPNs and other services without requiring a full MPLS infrastructure.
3. Disaster Recovery: MPLSoGRE supports disaster recovery solutions by enabling the creation of backup paths over IP networks, ensuring that MPLS traffic can be rerouted in case of network failures.
4. Traffic Engineering: By leveraging MPLSoGRE, network operators can implement traffic engineering strategies to optimize the flow of data across their networks, improving performance and reliability.