A fast optical switch and networks comprising fast optical switches are disclosed herein. In an example embodiment, a fast optical switch includes two or more fabric switches; a first selector switch; and a second selector switch. The first selector switch may selectively pass a signal to one of the two or more fabric switches. The one of the two or more fabric switches may act on the received signal to provide a switched signal and the second selector switch may selectively receive the switched signal provided by the one of the two or more fabric switches. A slot of the fast optical switch comprises a transmission window of one of the two or more fabric switches that occurs in parallel with at least a portion of a reconfiguration window of the other of the two or more fabric switches.

Roughly described: a network interface device has an interface. The interface is coupled to first network interface device circuitry, host interface circuitry and host offload circuitry. The host interface circuitry is configured to interface to a host device and has a scheduler configured to schedule providing and/or receiving of data to/from the host device. The interface is configured to allow at least one of: data to be provided to said host interface circuitry from at least one of said first network device interface circuitry and said host offload circuitry; and data to be provided from said host interface circuitry to at least one of said first network interface device circuitry and said host offload circuitry.

Roughly described: a network interface device has an interface. The interface is coupled to first network interface device circuitry, host interface circuitry and host offload circuitry. The host interface circuitry is configured to interface to a host device and has a scheduler configured to schedule providing and/or receiving of data to/from the host device. The interface is configured to allow at least one of: data to be provided to said host interface circuitry from at least one of said first network device interface circuitry and said host offload circuitry; and data to be provided from said host interface circuitry to at least one of said first network interface device circuitry and said host offload circuitry.

A packet sending method is applied to a data transmission system and comprising: receiving, by a network interface card of a second device, a first packet that is from a first QP of a first device and that is forwarded by using a switch; obtaining, by the network interface card of the second device, an instant rate of the first QP and a maximum sending rate of the first QP; determining, by the network interface card of the second device, an adjustment rate of the first QP based on the instant rate of the first QP and the maximum sending rate of the first QP; sending, by the network interface card of the second device, a congestion notification packet to the first device, where the congestion notification packet carries the adjustment rate of the first QP.

A packet sending method is applied to a data transmission system and comprising: receiving, by a network interface card of a second device, a first packet that is from a first QP of a first device and that is forwarded by using a switch; obtaining, by the network interface card of the second device, an instant rate of the first QP and a maximum sending rate of the first QP; determining, by the network interface card of the second device, an adjustment rate of the first QP based on the instant rate of the first QP and the maximum sending rate of the first QP; sending, by the network interface card of the second device, a congestion notification packet to the first device, where the congestion notification packet carries the adjustment rate of the first QP.

A virtual network device increases the effective number of local physical ports by converting each of the local physical ports into a plurality of virtual local physical ports, and the effective number of network physical ports by converting each of the network physical ports into a plurality of virtual network physical ports.

A luminaire having a waveguide suspended beneath a mounting element, the waveguide has a first surface proximal to the mounting element, a second surface distal to the mounting element, and an edge between the first and the second surfaces. At least one cavity extends into the waveguide from the first surface to the second surface. A LED component is coupled to the waveguide so as to emit light into the cavity. LED support structures are also disclosed.

A network switch device is described. The network switch device includes a plurality of processor devices configured to perform different respective functions of the network switch device, a block of shared memory having a plurality of single port memory banks, and a memory controller configured to allocate respective sets of banks among the single port memory banks to processor devices among the plurality of processor devices, and determine respective configurations of the sets of memory banks as one of i) a single port configuration in which respective single port memory banks support a single read or write memory operation to a memory location in a memory access cycle, and ii) a virtual multi-port configuration in which respective single port memory banks support two or more concurrent read or write memory operations to a same memory location, based on memory access requirements of the corresponding processor device.

A system, computer-readable media and computer-implemented method for automated network adapter activation in connection with fibre channel uplink mapping. The system includes a non-virtualized storage area network switch having a plurality of fibre channel ports. Each of the fibre channel ports is coupled to a corresponding cable to at least partly define a fibre channel uplink. The system also includes a plurality of client devices. Each client device has a network adapter. The system also includes a processing element and non-transitory computer-readable media having computer-readable instructions instructing the processing element to complete the following steps: (1) automatically execute an algorithm to determine a sequence for mapping the network adapters to respective fibre channel uplinks; (2) automatically determine a network adapter activation pattern based on the sequence to include a time delay between the network adapters; (3) automatically map the network adapters to respective fibre channel uplinks according to the sequence; and (4) automatically activate the network adapters based on the network adapter activation pattern.

The subject technology relates to the management of a shared buffer memory in a network switch. Systems, methods, and machine readable media are provided for receiving a data packet at a first network queue from among a plurality of network queues, determining if a fill level of a queue in a shared buffer of the network switch exceeds a dynamic queue threshold, and in an event that the fill level of the shared buffer exceeds the dynamic queue threshold, determining if a fill level of the first network queue is less than a static queue minimum threshold.