Non-disruptive integrated testing of network infrastructure in which one or more processors of a first network interface device (NID) performs tests on a network cable connected to a first NID of a host system, and connected to a second NID. Tests verify connectivity of the cable, a bandwidth capacity baseline, and a maximum bandwidth of the network cable. A self-test determines the host operating system, host status, and operational status of the host NID, and responsive to changed conditions, NID settings are reverted to a pre-validated condition state, and confirmation of reverting is sent to the host. Network activity is suspended if received by the host ID during scheduled network cable tests. Upon completion of tests and storing of test results in NID memory network activity resumes. Results of the tests are transferred from memory of the first NID to persistent storage of the host system.