Huawei Technologies Google Huawei Technologies ZTE Corp. Cisco Systems When an LSP fails to deliver user traffic, the failure cannot always be detected by the MPLS control plane. RFC4379 defines a mechanism that would enable users to detect such failure and to isolate faults. YANG [RFC6020] is a data definition language that was introduced to define the contents of a conceptual data store that allows networked devices to be managed using NETCONF RFC[6241]. This document defines a YANG data model that can be used to configure and manage LSP-Ping.