International Business Machines Corporation

Lenovo (singapore) Pte. Ltd.

Cisco Technology, Inc.

Alcatel

Claude Basso

Fabrice Jean Verplanken

Jean Louis Calvignac

Colin Beaton Verrilli

Natarajan Vaidhyanathan

Philippe Damon

Chih-Jen Chang

Bruce Marshall Walk

David Alan Shedivy

Josep Cors

William Joseph Armstrong

Gordon Taylor Davis

Marco C Heddes

Cyriel Johan Minkenberg

Todd Alan Greenfield

Mircea R Gusat

Kenneth Michael Valk

Daniel Wind

Jean-Paul Aldebert

Jean L Calvignac

Kyle Alan Lucke

Ravi Kumar Arimilli

Joseph Allen Kirscht

Joseph Franklin Logan

Francois Abel

Cheng Song

Fredy Daniel Neeser

Brahmanand Kumar Gorti

Jean-Luc Frenoy

David R Engebretsen

Piyush Chunilal Patel

Anthony Matteo Gallo

Casimer M DeCusatis

Ronald Edward Fuhs

Daniel Orsatti

Scott Michael Willenborg

Nikolaos Chrysos

Jeffrey James Lynch

Keshav G Kamble

Lakshminarayana Baba Arimilli

Brian Thomas Vanderpool

Ethan M Spiegel

Sonia Kiang Rovner

Max Robert Povse

Hubertus Franke

Christoph Raisch

Steven Richard Perrin

Edward Joseph Seminaro

Michel Poret

Clark Debs Jeffries

Harm Peter Hofstee

Claude R Galand

Daniel Gene Eisenhauer

Paolo Scotton

Piyush Chaudhary

Bernard Metzler

Jan-Bernd Themann

Laurent Frelechoux

Carlos Francisco Fuente

Theodore Brian Vojnovich

Philip Rogers Hillier, Iii

Paul Edward Movall

Robert Birke

Didier F Giroir

Rolf Clauberg

Bengi Karacali-Akyamac

Daniel Crisan

Sridhar Rao

Ronald Peter Luijten

Eric G Thiemann

Andre Pauporte

Renato John Recio

Daniel Mark Dreps

Eren Kursun

Saravanan Sethuraman

Bernard Charles Drerup

Jody B Joyner

Richard Harold Boivie

Harvey Gene Kiel

Wesley Michael Felter

Satya Prakash Sharma

Hans-Werner Tast

John Michael Tracey

Jens Leenstra

Nicolas Dupuis

Aline Fichou

Nilanjan Mukherjee

Henry Joseph May

Gilles Toubol

Gerald Lebizay

Herman Dietrich Dierks

Jean-Marc Berthaud

Anil Pothireddy

Olen L Stokes

Paul Gregory Crumley

Harold D Dykeman

Jean-Marie L Munier

Seeta Hariharan

Laurent Nicolas

Dominique Rigal

Embodiments for dynamic bandwidth allocation in cloud network switches in a cloud computing environment are provided. Quality of service (QoS) policies may be dynamically changed in one or more cloud network switches based on dynamically estimating expected traffic demands for each of a plurality of traffic classes, wherein bandwidth is dynamically allocated among queues based on changing the QoS policies.

Dynamic bandwidth allocation in cloud network switches based on traffic demand prediction

Techniques for receiving data at a physical coding sublayer (PCS) transmit structure from a media access control (MAC) sublayer are provided. A PCS transmit structure is configured to receive data from a MAC sublayer, the PCS transmit structure comprising a first FEC hardware module that performs FEC encoding, in a first clock domain, on the data to generate FEC encoded data. Further, a PCS receive structure configured to receive the FEC encoded data from the PCS transmit structure, the PCS receive structure comprising a second FEC hardware module is configured to perform FEC decoding, in the second clock domain, on the FEC encoded data to generate FEC decoded data.

Integrated physical coding sublayer and forward error correction in networking applications

IEEE 802.1Q and Enhanced Transmission Selection provide only eight different traffic classes that may be used to control bandwidth in a particular physical connection (or link). Instead of relying only on these eight traffic classes to manage bandwidth, the embodiments discussed herein disclose using an Enhanced Transmission Selection scheduler that permits a network device to set the bandwidth for an individual virtual LAN. Allocating bandwidth in a port based on a virtual LAN ID permits a network device to allocate bandwidth to, e.g., millions of unique virtual LANs. Thus, this technique may increase the granular control of the network fabric and its performance.

Flexible and scalable enhanced transmission selection method for network fabrics

Techniques for network performance assessment are described. Techniques may include collecting initial measurements relating to transmission of probe traffic between endpoints of endpoint pairs in a plurality of endpoint pairs and clustering the plurality of endpoints into a plurality of endpoint groups. The method may also include determining a plurality of endpoint group pairs and generating a network performance assessment, based on measuring performance metrics pertaining to traffic between endpoints within the endpoint groups in the plurality of endpoint group pairs.

Network performance assessment without topological information

Techniques are disclosed for notifying network control software of new and moved source MAC addresses. In one embodiment, a switch may redirect a packet sent by a new or migrated virtual machine to the network control software as a notification. The switch does not forward the packet, thereby protecting against denial of service attacks. The switch further adds to a forwarding database a temporary entry which includes a 'No_Redirect' flag for a new source MAC address, or updates an existing entry for a source MAC address that hits in the forwarding database by setting the 'No_Redirect' flag. The &#x201c;No_Redirect&#x201d; flag indicates whether a notification has already been sent to the network control software for this source MAC address. The switch may periodically retry the notification to the network control software, until the network control software validates the source MAC address, depending on whether the &#x201c;No_Redirect&#x201d; is set.

Network control software notification and invalidation of static entries

In one embodiment, a method includes receiving a plurality of flows, each flow comprising packets of data and assigning a service credit to each of the plurality of flows. In addition, the method includes assigning a weight parameter to each of the plurality of flows, and selecting a flow from a head of a first control queue unless the first control queue is empty or there is indication that the first control queue should be avoided. A flow is selected from a head of a second control queue in response to a determination that the first control queue is empty or there is indication that the first control queue should be avoided. Additionally, the method includes providing a number of units of service to the selected flow. Moreover, the method includes decreasing the selected flow's service credit by an amount corresponding to the number of units of service provided thereto.

Arbitration of multiple-thousands of flows for convergence enhanced ethernet

A network interface controller includes a media access controller and a host adapter. The host adapter includes a transmit route connected to receive an in-band packet from a host and further connected to transmit the in-band packet to the media access controller. The network interface controller also includes a sideband port controller connected to receive a sideband packet destined for a network from a sideband endpoint and further connected to transmit the sideband packet to the host adapter. The host adapter further includes a host buffer to store the in-band packet, a sideband buffer to store the sideband packet, and an arbiter connected to allow, at different times, the in-band packet to advance along the transmit route from the host buffer to the media access controller and the sideband packet to advance along the transmit route from the sideband buffer to the media access controller.

Network controller&#x2014;sideband interface port controller

Techniques for receiving data at a physical coding sublayer (PCS) transmit structure from a media access control (MAC) sublayer are provided. A PCS transmit structure is configured to receive data from a MAC sublayer, the PCS transmit structure comprising a first FEC hardware module that inserts one or more alignment markers in the data and performs FEC encoding, in a first clock domain, on the one or more alignment markers and the data to generate FEC encoded data. Further, a PCS receive structure configured to receive the FEC encoded data from the PCS transmit structure, the PCS receive structure comprising a second FEC hardware module is configured to perform FEC decoding, in the second clock domain, on the FEC encoded data to generate FEC decoded data, and remove the one or more alignment markers from the FEC decoded data.

Embodiments provide a TCAM-based access control list that supports disjunction operations in rules. A network frame is received. Embodiments determine set TCP flags of the network frame. Upon determining that the set TCP flags match a first entry in a numeric range table, bits of a search key corresponding to the first entry are updated. The search key accesses a second entry stored in a TCAM. The first entry further comprises an encode field to scan a TCP header of the network frame for set TCP flags, a first mask field to a condition corresponding to unset TCP flags to identify in the network frame, a second mask field to a condition corresponding to set TCP flags to identify in the network frame, and an operation field specifying a disjunction operation for comparing the set TCP flags with the first mask field and the second mask field.

Supporting access control list rules that apply to TCP segments belonging to 'established' connection

Techniques are provided for receiving data at a physical coding sublayer (PCS) transmit structure from a media access control (MAC) sublayer. Data is received at a PCS transmit structure from a MAC sublayer, and one or more alignment markers are inserted in the data. FEC encoding is performed, in a first clock domain, on the one or more alignment markers and the data in the PCS transmit structure to generate FEC encoded data. The FEC encoded data is transmitted from the first clock domain with a first clock cycle to a second clock domain with a second clock cycle, and the FEC encoded data is transmitted on one or more physical medium attachment (PMA) lanes to a PCS receive structure. FEC decoding is performed, in the second clock domain, on the FEC encoded data in the PCS receive structure to generate FEC decoded data.

Techniques are disclosed for notifying network control software of new and moved source MAC addresses. In one embodiment, a switch detects packets sent by a new or migrated virtual machine, and sends a copy of a detected packet to the network control software as a notification. The switch further learns the source MAC address, thereby permitting the entry to be used for normal forwarding prior to validation of the entry and the VM associated therewith by the network control software. Until the network control software has validated the VM, the switch may periodically retry the notification to the network control software. 'No_Redirect' and 'Not_Validated' flags may be used to indicate whether a notification has already been attempted and thus no retry is necessary, and that the VM associated with the VM has not yet been validated, respectively.

Network control software notification with advance learning

A network interface controller for providing a connection for a device to a network. The network interface controller may include a sideband port controller. The sideband port controller may provide a sideband connection between the network and a sideband endpoint circuit that is operative to communicate information with the network via the sideband. The sideband port controller may include a transmit data route having an input for receiving packets from the sideband endpoint circuit and an output for passing packets received from the sideband endpoint to the network. A packet parser is connected to the transmit data route. The packet parser is operative to read data from packets received from the sideband endpoint and is further operative to analyze the data.

Network controller-sideband interface port controller

A network interface controller (NC) that can provide a connection for a device to a network. The NC can include a sideband port controller. The sideband port controller can provide a sideband connection between the network and a sideband endpoint circuit that can communicate information with the network via the sideband. The sideband port controller can include a receive data route that has an input for receiving packets of data from the network and an output for passing the packets of data received from the network to the sideband endpoint circuit. The receive data route may include a buffer to receive the packets of data from the network and to pass the packets of data received from the network to the sideband endpoint.

Growing community of inventors

Raleigh, NC, United States of America

Claude Basso