Identifier and Locator Separation Based Site Multi-homing Path Failure Recovery

Abstract

Multi-homing is one of the effective ways to defeat path failure and increase the reliability of site network service. However, limited by the TCP/IP architecture, multi-homing has not been well deployment. In this paper, we proposed a sit multi-homing path failure recovery method based on “Locator/Identifier Split” by adding mapping service and RTT cooperative detection mechanism to the edge router. In order to reduce the probing’s cost of the router’s resource and link bandwidth, we also optimized the probing algorithm by reducing unnecessary active probing. The results of simulation test proved that this method could effectively detect the path failure and performance drop including packets delay and packets loss, and made a fast path switch to ensure the normal running of the upper application services (e.g., FTP). We also gave a theory analysis of the overhead brought by the sit multi-homing path failure recovery method. It shows that the addition bandwidth cost is 0.036% of the simulation link bandwidth and our approach is practicable.