Transparent continuation of controller applications in redundant networks
Original Publication Date: 2003-Jan-27
Included in the Prior Art Database: 2003-Jan-27
Applications running in a network of embedded controllers require a high degree of transparency with respect to the actual network topology. When failures occur in the network domain, for instance, a network interface adapter fails, the software associations with this interface inside the TCP/IP stack are invalid. Applications will experience a disruption of service in this case. We present a method of transparently continuing these applications in the presence of such network failures if the physical network provides redundant interfaces at each controller station. The "swap link" method rmaps the internal resources to another interface and transparently routes the network packets over the redundant network.