A company decided to replace IEEE 802.1s on the campus and you must propose a Layer 2 open standard technology that is highly scalable, ensures a resilient loop-free switched domain, and allows for…

TRILL (Transparent Interconnection of Lots of Links), defined in IETF RFC 6325, is an open standard designed to replace spanning tree in campus networks. It uses IS-IS as a link-state routing protocol to build a loop-free topology without blocking any ports, allowing ECMP across all available links simultaneously. This directly addresses the requirements of scalability, resiliency, open standardization, and full link utilization.

VxLAN is a network virtualization overlay that encapsulates Layer 2 frames in UDP/IP to extend Layer 2 across Layer 3 boundaries; it is not designed as a campus loop-free switching replacement for spanning tree.

LACP (Link Aggregation Control Protocol) bundles multiple physical links between two devices into a single logical link; it does not provide a campus-wide loop-free Layer 2 topology.

FabricPath is Cisco-proprietary technology based on TRILL concepts and is not an open standard, failing the requirement for an open standard solution.

MST (IEEE 802.1s) is the exact technology being replaced in this scenario and still blocks redundant links to prevent loops, so it does not allow utilization of all links.