Abstract: In order to solve the interconnection problems of a company network,meet the requirements of the stability,reliability,adaptability and flexibility network,a simulation of the company network based on the virtual machine platform was made.It achieved success in solving some problems such as the interconnection of the network,the election intervention of designated router/a backup designated router,the generation intervention of the best path,the improvement of open shortest path first (OSPF) network safety through the measures such as starting routing and remote access service and configuring OSPF routing protocol,modifying interface priority and RouterID,modifying interface cost,setting OSPF interface password,configuring the inbound and outbound filters.