A dialing test method, a dialing test system, and a computing node relate to the network field. In this method, a dialing test system respectively creates a two dialing test ports on two computing nodes, where both Internet Protocol (IP) addresses of the two dialing test ports are IP addresses of a dialing test network, and the dialing test network does not overlap a service network of a virtual machine (VM). The dialing test system separately deploys respective dialing test resources for the two dialing test ports, and the dialing test resources does not overlap a resource of the VM on the two computing nodes, and the dialing test system triggers a dialing test procedure such that a dialing test task is executed between the two dialing test ports using the dialing test resources.