Reliable virtual network forwarding path method

The invention provides a reliable virtual network forwarding path method, which solves the problem of how to construct a reliable virtual forwarding path, and can meet the requirement that different types of service flows do not interfere with each other and can be forwarded reliably. According to the method, non-correlation between paths is guaranteed through ECMP fractional topology cutting, non-correlation NFP backup paths in topology sub-regions are firstly obtained through a maximum redundancy tree (MRT) graph cutting method on the premise that reliability indexes are considered, then divided sub-topologies are cut in global topology, remaining feasible sub-topology regions are repeatedly searched, and therefore the reliability of the whole topology is improved. The non-correlation between the NFP paths in the same area is ensured, the non-correlation between the NFP paths in different areas is also ensured, and a reliable virtual forwarding path is formed. 本发明提供一种可靠虚拟网络的转发路径方法，解决如何构建可靠的虚拟转发路径的问题，能够满足不同类