MPLS TE - TE Tunnels

An MPLS traffic engineering (TE) tunnel is a construct that is employed within the framework of MPLS traffic engineering. They are mechanisms that are used in MPLS networks to optimize and manage traffic flows across the backbone, ensuring efficient use of network resources and guaranteeing desired Quality of Service (QoS) for critical applications.

MPLS TE builds unidirectional tunnels from a source to the destination using Label Switched Paths (LSPs). These tunnels can have requirements such as bandwidth, affinity, or priority.

https://networklessons.com/mpls/introduction-to-mpls-traffic-engineering-te