Abstract: Techniques of packet level redundancy in distributed computing systems are disclosed herein. In one example, upon receiving an original packet to be transmitted from a source host to an application executing at a destination host, the source host generates a duplicated packet based on the received original packet. The source host can then encapsulate the original and duplicated packets with first and second outer headers having first and second header values, respectively, and transmitting the original and the duplicated packets from the source host to the destination host via a first network path and a second network path in the computer network, respectively. Then, the transmitted original and duplicated packets can be de-duplicated at the destination host before providing the de-duplicated original and duplicated packets to the application executing at the destination host.

Abstract: A method, system, and one or more computer-readable storage media for detecting sleeping computing devices are provided herein. The method includes querying, via a computing device, a system neighbor table of the computing device to determine whether a target computing device is reachable and, if the target computing device is unreachable, sending a neighbor discovery packet to the target computing device. The method also includes re-querying the system neighbor table to determine whether the target computing device is reachable and, if the target computing device is unreachable, determining whether the target computing device has been determined to be unreachable at least a specified number of times in a row. The method further includes determining that the target computing device is manageable if the target computing device has been determined to be unreachable at least the specified number of times in a row.