Current network management approaches and their implementations are not intended to address dynamic situations that need rapid delivery of good-enough and comprehensive solutions. In this paper, we introduce a novel mashup ecosystem, called Mashment Ecosystem, that allows Network Administrators to conduct on a Mashment Maker the activities and interactions necessary to provide Mashments. Mashments are mashups aimed to tackle network management situations. We evaluate the Mashment Ecoystem by estimating with the Keystroke-Level Model and measuring in a test scenario the time that Network Administrators take to perform the activities of creating, launching, and publishing Mashments. Similarly, we evaluate the time for retrieving information about a network management situation by using or not Mashments. The evaluation results corroborated that Network Administrators, in our ecosystem, need short-time to deal with network management situations