Systems and methods for detecting defect propagation in a networked environment comprising a defect detection component to detect defects in an aggregate signal and/or in individual signals; and a replacement signal component to generate a maintenance signal to replace defective signals detected by the defect detection component. The maintenance signal can be a uniform signal type regardless of a type associated with a defective signal. The maintenance signal can replace a defective signal during aggregation, by an aggregation component. In another aspect, the maintenance signal can replace the defective signal during de-aggregation