Abstract: A method for detecting and managing a futile neighbor state loop during link state routing is disclosed. The method can include reading a threshold parameter for link state routing, wherein the threshold parameter indicates a number of routing attempts, and performing link state routing to a node via a primary interface. The method can further include detecting a futile neighbor state loop during link state routing to the node via the primary interface by detecting a number of routing attempts that has reached the threshold parameter and detecting an available backup interface to the node. The method can further include suspending the primary interface to the node and switching routing to the backup interface.

Abstract: The present invention discloses a solution for automated interface switching among routing interfaces. In the solution, a routing daemon can be responsive to operator commands. Routing can be performed in a restricted parallel multi-access interface configuration comprised of a primary and backup interface for conveying routing protocol traffic. The backup interface can be utilized only when the associated primary interface is unavailable. The commands can include a suspend and an activate interface command able to modify the operation of one or more interfaces at the application layer. The suspend interface command can suppress network routing protocol traffic over a specified primary interface and route the traffic over the backup interface. The backup interface can then be designated as the primary interface for which the routing traffic can be conveyed. The activate interface command can activate a suspended interface and can be designated as a backup interface when a primary interface is available.

Abstract: A method for detecting and managing a futile neighbor state loop during link state routing is disclosed. The method can include reading a threshold parameter for link state routing, wherein the threshold parameter indicates a number of routing attempts, and performing link state routing to a node via a primary interface. The method can further include detecting a futile neighbor state loop during link state routing to the node via the primary interface by detecting a number of routing attempts that has reached the threshold parameter and detecting an available backup interface to the node. The method can further include suspending the primary interface to the node and switching routing to the backup interface.