Abstract: Provided in some embodiments are systems and methods for determining a data flow path including a plurality of network devices for routing data from a first network device to a second network device; determining for the network devices one or more flow rules that specify an input for receiving data, an output for outputting data, and a role tag indicative of a role of a network device, where the role tag for one or more flow rules for a first network device of the network devices indicates a source role; distributing, to the network devices, the one or more flow rules; determining malicious activity on the data flow path; determining that the first network device is a source based at least in part on the role tag for the first network device; and sending, to the first network device, a blocking flow rule to inhibit routing of malicious data.

Abstract: Provided in some embodiments are systems and methods for determining a data flow path including a plurality of network devices for routing data from a first network device to a second network device; determining for the network devices one or more flow rules that specify an input for receiving data, an output for outputting data, and a role tag indicative of a role of a network device, where the role tag for one or more flow rules for a first network device of the network devices indicates a source role; distributing, to the network devices, the one or more flow rules; determining malicious activity on the data flow path; determining that the first network device is a source based at least in part on the role tag for the first network device; and sending, to the first network device, a blocking flow rule to inhibit routing of malicious data.

Abstract: Provided in some embodiments are systems and methods for determining a data flow path including a plurality of network devices for routing data from a first network device to a second network device; determining for the network devices one or more flow rules that specify an input for receiving data, an output for outputting data, and a role tag indicative of a role of a network device, where the role tag for one or more flow rules for a first network device of the network devices indicates a source role; distributing, to the network devices, the one or more flow rules; determining malicious activity on the data flow path; determining that the first network device is a source based at least in part on the role tag for the first network device; and sending, to the first network device, a blocking flow rule to inhibit routing of malicious data

Abstract: In an example, there is disclosed a computing apparatus, having: a network interface to communicatively couple to a software-defined network (SDN); first one or more logic elements providing an SDN controller engine to provide a control function for the SDN; and second one or more logic elements providing a route tracing engine to: receive a tunneling notification from a network device agent, the tunneling notification associated with a network flow; and perform a backtracking traceroute operation to deterministically identify a source device for the flow. There is also disclosed a method of providing the foregoing, and one or more tangible, non-transitory computer-readable storage mediums for providing the foregoing.

Abstract: Provided in some embodiments are systems and methods for determining a data flow path including a plurality of network devices for routing data from a first network device to a second network device; determining for the network devices one or more flow rules that specify an input for receiving data, an output for outputting data, and a role tag indicative of a role of a network device, where the role tag for one or more flow rules for a first network device of the network devices indicates a source role; distributing, to the network devices, the one or more flow rules; determining malicious activity on the data flow path; determining that the first network device is a source based at least in part on the role tag for the first network device; and sending, to the first network device, a blocking flow rule to inhibit routing of malicious data.

Abstract: In an example, there is disclosed a computing apparatus, having: a network interface to communicatively couple to a software-defined network (SDN); first one or more logic elements providing an SDN controller engine to provide a control function for the SDN; and second one or more logic elements providing a route tracing engine to: receive a tunneling notification from a network device agent, the tunneling notification associated with a network flow; and perform a backtracking traceroute operation to deterministically identify a source device for the flow. There is also disclosed a method of providing the foregoing, and one or more tangible, non-transitory computer-readable storage mediums for providing the foregoing.

Abstract: A method for real time message transmission in a token ring network is provided. The method initializes each node in the network, including setting a maximum message transmission time H.sub.i such that ##EQU1## is the transmission time of a message in a message stream, P.sub.i is the period length of the message stream, TTRT is the target token rotation time, and .tau. is the portion of TTRT that is unavailable to transmit messages. The messages are then transmitted when a token arrives at a node for the duration of H.sub.i. Using this method with the timed token protocol, the synchronous messages are guaranteed to be transmitted before their deadlines if the utilization of synchronous messages is no more than 33% of available utilization.

Abstract: A method for real time message transmission in a token ring network is provided. The method initializes each node in the network, including setting a maximum message transmission time H.sub.i for node i such that ##EQU1## where C.sub.i is the transmission time of a message in a message stream, P.sub.i is the period length of the message stream, and a is a non-negative constant between zero and one. The messages are then transmitted when a token arrives at a node for the duration of H.sub.i. Using this method with the timed token protocol, the synchronous messages are guaranteed to be transmitted before their deadlines if the utilization of synchronous messages is no more than ##EQU2## of available utilization.