Hewlett-Packard Development Company, L.p.

Hewlett Packard Enterprise Development LP

Hewlett Packard Enterprise Department LP

Jose Renato G Santos

Yoshio Frank Turner

Jean Tourrilhes

Michael S Schlansker

Michael Renne Ty Tan

Shih-Yuan Wang

Jeffrey Clifford Mogul

Moray McLaren

Kevin T Lim

Mike Schlansker

Wayne V Sorin

Parthasarathy Ranganathan

Paolo Faraboschi

Jichuan Chang

Sujata Banerjee

Paul Allen Bottorff

Praveen Yalagandula

Niraj Tolia

Antonio Lain

Stephen G Low

Guodong Zhang

Lucian Popa

Jean Tourrihes

Example embodiments relate to providing efficient routing in software defined networks. In example embodiments, an indirect group table includes a first group entry that is associated with a first route tree in a software defined network, wherein the indirect group table affects a plurality of forwarding table entries associated with the first group entry. A failure is detected in the first route tree during a data transmission, and a notification of the failure is sent to a remote controller device, where the remote controller device identifies a second route tree that does not include the failure. After the remote controller device updates the first group entry to be associated with the second route tree, the data transmission is performed using the second route tree.

Efficient routing in software defined networks

Disclosed herein are a system, non-transitory computer readable medium, and method for governing communications of a bare metal guest in a cloud network. A network interface handles packets of data in accordance with commands by a control agent.

Governing bare metal guests

Example embodiments relate to providing efficient routing in software defined networks. In example embodiments, an indirect group table includes a first group entry that is associated with a first route tree in a software defined network. A failure is detected in the first route tree during a data transmission, and a notification of the failure is sent to a remote controller device, where the remote controller device identifies a second route tree that does not include the failure. After the remote controller device updates the first group entry to be associated with the second route tree, the data transmission is performed using the second route tree.

A technique includes using circuit switches to selectively couple packet switches of a switch assembly to the port connectors of the assembly.

Switch assembly

According to an example, a method for bandwidth guarantee and work conservation includes determining virtual machine (VM) bandwidth guarantees assigned to VMs in a network including a source VM that communicates with destination VMs. The method further includes assigning minimum bandwidth guarantees to communications between the source VM with the destination VMs by dividing a VM bandwidth guarantee assigned to the source VM between the destination VMs based on active VM-to-VM communications between the source VM and the destination VMs. The method also includes allocating, by a processor, spare bandwidth capacity in the network to a communication between the source VM and a destination VM based on the assigned minimum bandwidth guarantees.

Bandwidth guarantee and work conservation

Embodiments herein relate to addition or modification to a forwarding table based on an address. A first packet having a source address and a location value may be received. The source address includes a source of the first packet and the location value indicates at least part of a route along a network to the source address. The forwarding table is not modified or no new entry is added to the forwarding table, if the forwarding table does not include the source address.

Modification or addition to forwarding table based on address

A configurable Clos network includes leafs and spines and a switch fabric that connects the leafs and the spines. The switch fabric couples each leaf port of each leaf to at least one spine port of each spine.

Configurable Clos network

Managing non-congestion-controlled message traffic in a datacenter. Any non-congestion-controlled packets originating in a sending server and intended for a receiving server are encapsulated in the sending server and transmitted through a virtual circuit having a message transport protocol with rate control. The packets are decapsulated in the receiving server.

Methods of and apparatus for managing non-congestion-controlled message traffic in a datacenter

An optical interconnect () includes: a reflective body () having a first reflective surface () and a second reflective surface () opposite the first reflective surface (); a first optical waveguide () that directs a first optical signal received from a first communicating device () to the first reflective surface (); a second optical waveguide () that directs the first optical signal from the first reflective surface () of the reflective body () to a second communicating device (); a third optical waveguide () that directs a second optical signal received from the second communicating device () to the second reflective surface () of the reflective body (); and a fourth optical waveguide () that directs the second optical signal from the second reflective surface () of the reflective body () to the first communicating device ().

Optical interconnect

Packet processing for packets from a virtual machine includes receiving a packet from an external switch at a computer system hosting a plurality of virtual machines. If the received packet is a learning packet, storing a packet signature determined from the learning packet. For a packet to be transmitted from a virtual machine in the computer system, determining if the packet's signature matches the stored packet signature. If the packet's signature matches the stored packet signature, performing an action associated with the packet signature.

Virtual machine packet processing

A system and method are provided to route packets in a data center network. Individual packets are encapsulated at an edge of the data center network, so that each encapsulated packet includes a set of header fields, such as a tenant identifier. For each encapsulated packet, a hash class is determined from the set of header fields. A routing virtual local area network (VLAN) is selected for the packet based on the tenant identifier and the hash class.

Routing encapsulated data packets onto selected VLANs

In a method for managing a memory segment through use of a memory virtual appliance, data is encapsulated with the memory virtual appliance, in which the memory virtual appliance comprises a virtual machine configured to manage a memory segment in a physical memory. In addition, the memory virtual appliance is implemented using a virtualization wrapper comprising computer readable code enabling the encapsulated data to be shared among a plurality of clients. Moreover, the encapsulated data is stored in the memory segment controlled by the memory virtual appliance.

Managing a memory segment using a memory virtual appliance

Remote memory can be used for a number idle pages located on a virtual machine. A number of idle pages can be sent to the remote memory according to a placement policy, where the placement policy can include a number of weighting factors. A hypervisor on a computing device can record a local size and a remote page fault frequency of the number of virtual machines. The hypervisor can scan local memory to determine the number of idle pages and a number of idle virtual machines. The number of idle pages, including a page map and a remote address destination for each idle page, can be sent to the remote memory by the hypervisor. The number of virtual machines can be analyzed to determine a per-virtual machine local memory allocation.

Remote memory for virtual machines

A first virtual machine is implemented on one or more computing devices to generate input/output (I/O) requests to a hardware device. A second virtual machine is also implemented on the computing devices. A mechanism is to switch between a direct mode and an indirect mode without switching between a first context and a second context of the hardware device. In the direct mode, the I/O requests generated by the first virtual machine are to be sent to the hardware device without being redirected to the second virtual machine. In the indirect mode, the I/O requests generated by the first virtual machine are to be redirected to the second virtual machine for processing. The second virtual machine is to, after processing the I/O requests redirected to the second virtual machine, send the I/O requests to the hardware device.

Switching between direct mode and indirect mode for virtual machine I/O requests

Example methods, apparatus, and articles of manufacture to share memory spaces for access by hardware and software in a virtual machine environment are disclosed. A disclosed example method involves enabling a sharing of a memory page of a source domain executing on a first virtual machine with a destination domain executing on a second virtual machine. The example method also involves mapping the memory page to an address space of the destination domain and adding an address translation entry for the memory page in a table. In addition, the example method involves sharing the memory page with a hardware device for direct memory access of the memory page by the hardware device.

Growing community of inventors

San Jose, CA, United States of America

Jose Renato G Santos