In a network-troubleshooting situation, an end user tend to tell highly unclear reports like as 'just can not connect'. In most cases, it's hard to measure from a client side to clarify the detail of the network trouble. We proposed a mechanism for measuring network condition from client-side and gathering results to grasp the detail of the network trouble. We classify elements of a network trouble by layer, and thereby define a description of network connectivity. Our proposed description enables accurate information exchange between a network operator and end users. In this paper, we describe the definition of measurement layer. We also report prototype implementation and its evaluation.