The 802. 1CB protocol in the TSN protocol plays an important role in ensuring the reliability of the in-vehicle Ethernet network. It ensures the stable transmission of packets through link redundancy, and the inconsistency of transmission characteristics between different redundant links may affect subsequent traffic scheduling. Therefore, it is necessary to explore the impact of link redundancy on scheduling performance. This article starts from the topology redundancy structure of automobile network, analyzes the correlation between redundancy protocol and scheduling protocol, and discusses the influence of link redundancy on 802. 1Qbv timeaware shaper mechanism and 802. 1Qch cyclic queuing and forwarding mechanism. Finally, we establish a link redundancy scheduling performance evaluation model, based on OMNeT++ and hardware verification platform. We simulate and verify the above effects. The results show that the difference in the arrival interval of redundant traffic and the number of link hops caused by link redundancy has a significant impact on 802. 1Qbv and 802. 1Qch, respectively. In addition, it is necessary to pay attention to the impact of changes in the rate of bridge ports in redundant topology.