A quality check of service received by a CPE device within a first customer premise is initiated, and if the results of the quality check indicate a problem with the service received by the CPE device, one or more CPE devices within one or more customer premises sharing upstream network resources with the first customer premise is identified and a quality check of service received by the one or more identified CPE devices can be conducted. If the results of the quality check of the one or more identified CPE devices indicate a problem with the service received by the CPE devices, a determination can be made that a problem exists at a network component upstream from the first customer premise and the other one or more customer premises.