Initial implementations of point-to-point Ethernet over SONET/SDH transport

There is considerable interest in using Ethernet over SONET/SDH (EoS) for Ethernet transport in a wide area network. EoS leverages the existing SONET/SDH infrastructure to provide efficient Ethernet transport with excellent OAM capabilities. In our initial evaluations and deployments of EoS, we have encountered some issues, as is common with any new technology. These issues include non-transparent transport of Ethernet information, lack of carrier-class performance monitoring and fault propagation, and non-standardized implementation of basic concepts. Vendors, service providers, and standards bodies should work together to resolve these remaining issues and thus bring forth the full potential of EoS.