As the introduction of generalized multi-protocol label switching(GMPLS) for control plane, the technology of automatic switched optical networks (ASON) provides optical transmission network with greater intelligence. Based on the view consistency of topology between control plane and transport plane, this contribution proposes a new network survival mechanism-double links restoration to solve the single optical node failure. The mechanism seeks to protect for the two links of the failure point by detours in GMPLS simultaneously. Through detailed analysis of the common link restoration and double link restoration(DLR), the paper quantitatively presents the scheme for signaling recovery time in these two cases. From the mathematical formulas, it can be concluded that DLR overcomes the disadvantages about long signaling establishment delay in presence of node failure traditionally. Some experimental descriptions for the different restoration mechanisms are illustrated. It verifies the effectiveness of the proposed mechanism.