the mission cycle of networks is usually long. In order to expose network transmission delay failure effectively, reliability testing time is often several times of its mission cycle, that results in long development cycle and high test cost; if shorten the testing time, it will bring the problem of both sample size too small and confidence too low. This paper develops network accelerated reliability testing principles, and Ethernet is modeled to establish reliability acceleration model based on endto-end delay that is finally verified based on OPNET simulation platform. This acceleration model is the base of Ethernet accelerated testing plan.