Technologies for coordinating access to packets include a network device. The network device is to establish a ring in a memory of the network device. The ring includes a plurality of slots. The network device is also to allocate cores to each of an input stage, an output stage, and a worker stage. The worker stage is to process data in a data packet with an associated worker function. The network device is also to add, with the input stage, an entry to a slot in the ring representative of a data packet received with a network interface controller of the network device, access, with the worker stage, the entry in the ring to process at least a portion of the data packet, and provide, with the output stage, the processed data packet to the network interface controller for transmission.

A network device includes a plurality of network interfaces configured to couple with a plurality of physical network links. A packet processor is configured to process packets received via the plurality of network interfaces. The packet processor includes a path selection engine that is configured to: for each of at least some packets processed by the packet processor, successively make path selection decisions that correspond to respective routing domains within a hierarchical communication network, the path selection decisions for forwarding the packet through the hierarchical communication network.

A network control system that includes several controllers for managing several switching elements. In some embodiments, each switching element implements at least one logical switching element and has a master controller. In some embodiments, at least one controller is a master of at least two switching elements. The network control system accepts definitions of the logical switching elements and, in some embodiments, each logical switching element has a master controller. In some embodiments, at least one controller is a master for at least two logical switching elements.

Technologies for coordinating access to packets include a network device. The network device is to establish a ring in a memory of the network device. The ring includes a plurality of slots. The network device is also to allocate cores to each of an input stage, an output stage, and a worker stage. The worker stage is to process data in a data packet with an associated worker function. The network device is also to add, with the input stage, an entry to a slot in the ring representative of a data packet received with a network interface controller of the network device, access, with the worker stage, the entry in the ring to process at least a portion of the data packet, and provide, with the output stage, the processed data packet to the network interface controller for transmission.

A method and system provide for inline packet response generation implemented by a network device functioning as a switch in a software defined networking (SDN) network. The method configures the flow control pipeline to enable the inline response generation without use of the control channel and SDN controller after configuration. The method includes connecting with the SDN controller, receiving a packet out data packet from SDN controller with a template message and a buffer identifier (ID) for the template message, and identifying the received packet out data packet as containing the template message. The method further includes installing the template message into a buffer with corresponding buffer ID, receiving a first data packet from the SDN controller identifying matching criteria and the buffer ID, and updating a flow control pipeline to match on the matching criteria and to point to the buffer with the buffer ID.

Some embodiments of the invention provide a forwarding element that can be configured through in-band data-plane messages from a remote controller that is a physically separate machine from the forwarding element. The forwarding element of some embodiments has data plane circuits that include several configurable message-processing stages, several storage queues, and a data-plane configurator. A set of one or more message-processing stages of the data plane are configured (1) to process configuration messages received by the data plane from the remote controller and (2) to store the configuration messages in a set of one or more storage queues. The data-plane configurator receives the configuration messages stored in the set of storage queues and configures one or more of the configurable message-processing stages based on configuration data in the configuration messages.

A method and network device for network traffic flooding. Specifically, the method and network device disclosed herein implement the mitigation of the lack of data-link layer (or L2 ) addressing resolutions, usually learned by or programmed manually into the network device, through the flooding of affected network traffic across identified network broadcast domains. Flooding of the network traffic in the aforementioned manner may ensure that at least the destination(s) of the network traffic receives the network traffic at least in scenarios where which it is unknown out of which particular physical network interface(s) should the network traffic be transmitted to reach the destination(s).

A method of utilizing the same hardware network interface card (NIC) in a gateway of a datacenter to communicate datacenter tenant packet traffic and packet traffic for a set of applications that execute in the user space of the gateway and utilize a network stack in the kernel space of the gateway. The method sends and receives packets for the datacenter tenant packet traffic through a packet datapath in the user space. The method sends incoming packets from the NIC to the set of applications through the datapath in the user space, a user-kernel transport driver connecting the kernel network stack to the datapath in the user space, and the kernel network stack. The method receives outgoing packets at the NIC from the set of applications through the kernel network stack, the user-kernel transport driver, and the data path in the user space.

A radar sensing system for a vehicle includes a transmitter, a receiver, and an interference mitigation processor. The transmitter transmits radio signals. The receiver receives radio signals. The received radio signals include reflected radio signals that are each transmitted radio signals reflected from objects in the environment. The receiver also down-converts and digitizes the received radio signals to produce a baseband sampled stream. The interference mitigation processor produces a second received radio signal that includes reflected radio signals that are transmitted radio signals reflected from a first object. The interference mitigation processor uses the second received radio signal to remove selected samples from the baseband sampled stream that are attributed to radio signals reflected from the first object to produce a modified baseband sampled stream. The receiver uses the modified baseband sampled stream to detect a second object more distant than the first object.

A method of performing bidirectional forwarding detection (BFD) by a hardware forwarding element that includes a set of ingress pipelines and a set of egress pipelines. Each ingress pipeline includes a packet generator. A packet generator in a first pipeline periodically generates a pair of packets to monitor the health of a particular egress link. The pair includes a BFD transmit packet and a BFD dummy transmit packet. The method forwards each dummy BFD transmit packet to a first egress pipeline and increments a counter at the first egress pipeline. Each BFD packet is transmitted through the particular egress link to a network node. BFD packets received from the network node are forwarded to the first egress pipeline and the value of the counter is rest. The method marks the particular egress link as failed when the value of the counter exceeds a predetermined threshold.