A legacy enterprise is using a Service Provider MPLS network to connect its head office and branches. Recently, they added a new branch to their network. Due to physical security concerns, they want…

GRE is a Layer 3 tunneling protocol that encapsulates network-layer packets and requires routing configuration on both tunnel endpoints, violating the no-routing-changes requirement.

L2TPv3 can carry Layer 2 frames but is not natively integrated with MPLS signaling and requires additional session negotiation overhead, making it slower to deploy and less seamless on an existing MPLS network than EoMPLS.

VXLAN is a data-center-oriented Layer 2 overlay that requires VTEP endpoints and underlay IP routing support not present in a traditional SP MPLS access architecture, making it unsuitable here without significant infrastructure additions.

EoMPLS (Ethernet over MPLS) establishes a Layer 2 pseudowire across the existing SP MPLS infrastructure, making the remote branch appear as a local Ethernet segment to the head office CCTV network. Because it operates entirely at Layer 2, no routing protocol changes or IP address reassignments are needed on any device. Leveraging the already-deployed MPLS core also means minimal new infrastructure, satisfying the time constraint.