Existing Support for Network Operations in Multilayer Transport Network based upon unified approach to OAM (Layer 0 - Layer 2)

This draft summarizes the existing ITU-T SG 15 standards, (Layer 0 - Layer 2) both technology-specific and generic across these technologies, relevant to leveraging OAM to support fault management, performance monitoring, and configuration management. Knowledge from this domain may be leveraged for the benefit of developing generic layer independent management for other layers.