METHOD AND DEVICE FOR LINK FAULT DETECTING AND RECOVERING BASED ON ARP INTERACTION

摘要

A method for link fault detecting and recovering based on the address resolution protocol (ARP) interaction is provided. The method includes: an internet protocol (IP) address, a mask, a policy-based/static route module and an ARP module are configured for the network devices of a home terminal and an opposite terminal; the policy-based/static route module periodically queries whether the ARP entry corresponding to the next hop exists, if yes, the link is available; otherwise, the ARP module is notified to keep alive the next hop; the ARP module performs the process for keeping alive the next hop, the ARP module notifies the policy-based/static route module to judge whether the link is available after keeping alive the next hop. A device for link fault detecting and recovering based on the ARP interaction is also provide. The present invention implements the purpose of the route keeping alive through the route keeping alive mechanism, and solves the problem in the prior art that after applying the policy-based route or the static route, the link detection or the bidirectional forwarding detection (BFD) cannot be perform, which causes that the configuration is complex and the cost of the system is heavy.