IP over DWDM (IPoDWDM) can have a large impact on the total cost of ownership of a network. Disaggregating the transponder solution, and installing the Digital Coherent Optic (DCO) directly in the router can both simplify the design and provide significant cost savings. With the advent of ZR+ optics, and advances in silicon chip efficiency, IPoDWDM is poised to become the new standard.