Improvement of Running Tunnel Based on OSPF TE

In the existing traffic engineering, information can only be transmitted in a single OSPF area. When there are multiple OSPF areas, the tunnel is difficult to establish. For this problem, combined with the existing OSPF technology on three categories LSA processing flow, in the right less impact on the relevant modules of the situation, solutions are proposed to achieve a particular area of traffic engineering information across the region spread to other regions in order to facilitate the establishment of range of the tunnel.