Large enterprises typically buy managed 100G wave service from Communications Service Providers (CSPs) for their business needs, paying monthly OPEX to the CSPs. When the network capacity required by the enterprise is low enough, buying managed 100G wave services is cost-effective for the enterprise. However, as network capacity increases, the monthly OPEX for the managed 100G wave service to the enterprise increases rapidly—compelling the enterprise to seek an alternative business model to contain the cost growth. This leads enterprises to embark on Do-It-Yourself (DIY) models in which the enterprise now procures network system equipment by itself, and only obtains lease or Indefeasible Right of Use (IRU) Dark Fiber (DF) from the CSP to implement the enterprise’s transport network.