Abstract: An aspect includes receiving, at a software-defined networking (SDN) controller, an inquiry from a virtual switch executing on a host machine. The inquiry includes a request to identify a flow of a data packet received at the virtual switch from a source virtual processor. The source virtual processor is either a logical partition (LPAR) or a virtual machine (VM) executing under control of a hypervisor on the host machine. A destination virtual processor associated with the data packet is determined by the SDN controller. In addition, the SDN controller identifies the flow between the source virtual processor and the destination virtual processor. The flow includes a least one virtual port in the virtual switch. The SDN controller instructs the virtual switch to send the data packet from the source virtual processor to the destination virtual processor via the identified flow.

Abstract: Embodiments relate to managing data flows through a virtual network. An aspect includes receiving, by a network interface card (NIC) connected to a hypervisor of a source computer, flows of data packets from one or more virtual machines managed by the hypervisor. The aspect includes running, by the NIC, an overlay network protocol to encapsulate the data packets, and to manage the flow of data through tunnels for the virtual network to a destination computer based on the overlay protocol, the tunnels transmitting the data packets through an underlying physical network underlying the virtual network.

Abstract: Embodiments relate to managing data flows through a virtual network. An aspect includes receiving, by a network interface card (NIC) connected to a hypervisor of a source computer, flows of data packets from one or more virtual machines managed by the hypervisor. The aspect includes running, by the NIC, an overlay network protocol to encapsulate the data packets, and to manage the flow of data through tunnels for the virtual network to a destination computer based on the overlay protocol, the tunnels transmitting the data packets through an underlying physical network underlying the virtual network.

Abstract: In one embodiment, a method for providing multi-protocol overlay handling includes receiving first traffic via an input overlay tunnel at a multi-protocol virtual tunnel end point (VTEP)-enabled device, the first traffic including a plurality of overlay-encapsulated packets which adhere to a first overlay network protocol, and wherein the input overlay tunnel adheres to the first overlay network protocol; routing the first traffic to a second overlay network tunnel which adheres to a second overlay network protocol when a destination of the first traffic is specified as the second overlay network tunnel, the second overlay network tunnel being terminated at the multi-protocol VTEP-enabled device; and bridging the first traffic to a destination overlay network tunnel terminated at the multi-protocol VTEP-enabled device when the destination of the first traffic is specified as the destination overlay network tunnel, the destination overlay network tunnel being terminated at the multi-protocol VTEP-enabled devic

Abstract: Embodiments relate to bypassing congestion points in a network. An aspect includes sampling queues of a plurality of switches in a network. When packet congestion is detected at a congestion point of a first switch, the packet flow contributing to the packet congestion is identified. A congestion notification message indicating the identified packet flow is then propagated to upstream switches, which are upstream from the first switch in the network. The congestion notification message is then snooped by the upstream switches. Virtual queues within the upstream switches are associated with the identified packet flow to hold packets associated with the identified packet flow. The packets associated with the identified packet flow are then re-routed to bypass the packet congestion in the first switch.

Abstract: According to one embodiment, a data center fabric network system includes a controller, a plurality of switches connected to the controller via a plurality of communication links, a source device connected to at least a first switch of the plurality of switches, a destination device connected to at least a second switch of the plurality of switches, and wherein the controller is adapted for: creating a topology of the data center fabric network system, determining paths between the plurality of switches, calculating one or more disjoint multi-paths from the source device to the destination device based on the topology, and writing the one or more disjoint multi-paths into a forwarding table of at least one of: the source device, the first switch, and a nearest shared switch to the source device.

Abstract: Direct memory transfer of data from the memory of a server to a memory of a switch. A server identifies a block of data in the memory of the server and a corresponding memory address space in the server. The server identifies a block of memory in the switch. The block of memory is at least the same size of the block of data. The switch comprises a network protocol. The server transfers the block of data into the block of memory. Based on the network protocol, the switch maps a network relationship. The mapping indicates a target server for the transferred block of data to be transmitted to.

Abstract: An interconnect component is provided fabricated as a preassembled optoelectronic interconnect structure. The interconnect structure has an optical waveguide link with first and second optoelectronic circuits attached to first and second ends of the waveguide link. The optoelectronic circuits include active optical componentry which facilitates optical signal communication across the optical waveguide link. Further, first and second pluralities of electrical contacts are associated with the first and second optoelectronic circuits, respectively, to facilitate electrically, operatively connecting the interconnect structure between first and second components of an electronic assembly as, for instance, a single, field-replaceable unit. The first and second components of the electronic assembly may be, for instance, stacked electronic components of the electronic assembly, or laterally offset components of a substantially planar electronic assembly.

Abstract: A method for determining disjoint multi-paths in a data center fabric network system, according to one embodiment, includes creating a topology of a data center fabric network system, wherein the system comprises a plurality of switches; determining paths between the plurality of switches; calculating one or more disjoint multi-paths from a source device to a destination device in the system; and writing the one or more disjoint multi-paths into a forwarding table of at least one of: the source device and a nearest shared switch to the source device.

Abstract: A first cluster includes first switching devices that are compatible with a software-defined networking (SDN) protocol. A second cluster includes second switching devices within or partially overlapping the first cluster. Each second switching device is compatible with a protocol for an open systems interconnection (OSI) model layer. The first switching devices include one or more border switching devices located at a boundary between the first cluster and the second cluster. Each border switching device is also compatible with the protocol for the OSI model layer. The first switching devices effect first multipathing through the network except through the second cluster, and the second switching devices effect second multipathing just through the second cluster of the network. As such, the first switching devices and the second switching devices together effect end-to-end multipathing through both the first cluster and the second cluster of the network.

Abstract: Congestion management for data traffic in a virtual domain identifies a congestion source and sends a message to the source to adjust data traffic rates. The source may be a virtual machine hosted by a physical server with one or more virtual servers incorporated. A congestion manager may identify the source and send the message to the source without affecting other data sources hosted by the physical server or the virtual servers. In some embodiments, information about the congestion source may be encapsulated in a packet payload readable only by the congestion source so only the congestion source receives the instruction to adjust the transmission rate.

Abstract: A virtual network is implemented on a physical network. A virtual network data packet is tunneled through the physical network via encapsulation within a physical network data packet and via transmission of the physical network data packet through the physical network. A network congestion notification capability of the virtual network is preserved and modified during transmission of virtual network data through the physical network and vice-versa. Congestion notification metadata can be copied from a header of a virtual network data packet to a header of a physical network data packet when the virtual network data packet is encapsulated into the physical network data packet. Congestion notification metadata can be copied from a header of a physical network data packet to a header of a virtual network data packet when the virtual network data packet is decapsulated from the physical network data packet.

Abstract: Congestion management for data traffic in a virtual domain identifies a congestion source and sends a message to the source to adjust data traffic rates. The source may be a virtual machine hosted by a physical server with one or more virtual servers incorporated. A congestion manager may identify the source and send the message to the source without affecting other data sources hosted by the physical server or the virtual servers. In some embodiments, information about the congestion source may be encapsulated in a packet payload readable only by the congestion source so only the congestion source receives the instruction to adjust the transmission rate.

Abstract: In one embodiment, a system includes an initiator port adapted to receive a traffic flow having a plurality of packets and a hardware processor and logic integrated with and/or executable by the processor, the logic being adapted to classify the traffic flow into a traffic class based on at least one criteria related to the traffic flow, the traffic class being selected from a plurality of traffic classes and transmit one or more packets of the traffic flow to a target port designated by the one or more packets of the traffic flow until an amount of flow credits allocated to the target port is insufficient to service additional packets. Other systems, methods, and computer program products for providing credit-based flow control are described in more embodiments.

Abstract: Embodiments relate to managing data flows at a virtual forwarding element. A system for managing data flows is provided. The system includes a network interface card (NIC) attached to or integrated with a host. The system is configured to perform a method. The method receives a plurality of data flows from a virtual forwarding element executing in the host. The plurality of data flows originate from a plurality of virtual machines executing in the host. Each of the plurality of data flows carries a different network identifier and a different tunnel header. The method maps, by the NIC, a plurality of tunnels defined by the plurality of tunnel headers to the plurality of data flows using the plurality of network identifiers. The method sends the plurality of data flows out of the host through the plurality of tunnels.

Abstract: Each of a network fabric controller device and a network fabric forwarder devices includes network connecting hardware and network managing logic. The network connecting hardware of the devices connects them to a singly contiguous network fabric including switching devices that route data between initiator nodes and target nodes and that have routing logic programmable by the controller device. The controller device does not directly route the data themselves. The network managing logic of the devices effects multipaths for transmission of the data through the singly contiguous network fabric from the initiator node to the target nodes via programming of the routing logic of the switching devices.

Abstract: A virtual network is implemented on a physical network. A virtual network data packet is tunneled through the physical network via encapsulation within a physical network data packet and via transmission of the physical network data packet through the physical network. A network congestion notification capability of the virtual network is preserved and modified during transmission of virtual network data through the physical network and vice-versa. Congestion notification metadata can be copied from a header of a virtual network data packet to a header of a physical network data packet when the virtual network data packet is encapsulated into the physical network data packet. Congestion notification metadata can be copied from a header of a physical network data packet to a header of a virtual network data packet when the virtual network data packet is decapsulated from the physical network data packet.

Abstract: A first cluster includes first switching devices that are compatible with a software-defined networking (SDN) protocol. A second cluster includes second switching devices within or partially overlapping the first cluster. Each second switching device is compatible with a protocol for an open systems interconnection (OSI) model layer. The first switching devices include one or more border switching devices located at a boundary between the first cluster and the second cluster. Each border switching device is also compatible with the protocol for the OSI model layer. The first switching devices effect first multipathing through the network except through the second cluster, and the second switching devices effect second multipathing just through the second cluster of the network. As such, the first switching devices and the second switching devices together effect end-to-end multipathing through both the first cluster and the second cluster of the network.

Abstract: An improved computer system may include a server carrying a computer processor in a Fiber Channel over Convergence Enhanced Ethernet (FCoCEE) network. The system may also include a reservation system in communication with the server that utilizes enhanced transmission selection (ETS) to reserve bandwidth for a priority group by scheduling bandwidth for the priority group based upon a projected workload.

Abstract: A system is provided projecting a three-dimensional image. The system includes a first light source, the first light source emitting light in a first direction. A second light source is provided, the second light source emitting light in a second direction, the second direction being opposite the first direction. A beam splitter device is disposed between the first light source and the second light source to receive light from the first light source and the second light source, the beam splitter device being arranged to rotate about an axis. An LCoS image device is disposed adjacent the beam splitter device, the LCoS image device having an image surface arranged substantially perpendicular to the first direction and the second direction.