International Business Machines Corporation

Lenovo (singapore) Pte. Ltd.

Josep Cors

Claude Basso

David Alan Shedivy

Colin Beaton Verrilli

William Joseph Armstrong

David R Engebretsen

Ward Ray Nelson

Kyle Alan Lucke

Bruce Marshall Walk

Theodore Brian Vojnovich

Debra L Angst

Venkatesh K Janakiraman

Natarajan Vaidhyanathan

Eric G Thiemann

Jun C Yin

Naresh Nayar

David Alan Christenson

Paul Edward Movall

Daniel Gene Eisenhauer

Jesse Paul Arroyo

Joseph Allen Kirscht

Scott Neil Dunham

Todd Alan Greenfield

Ethan M Spiegel

Jeffrey James Lynch

Gerhard A Widmayer

Sze-Wa Lao

Sameer M Shah

Carlos Francisco Fuente

Birgit Monika Pfitzmann

William Gavin Holland

Kenneth Michael Valk

Thomas M Brey

Joseph Edward Bolan

Gregory William Dake

Chandramouli Radhakrishnan

Adam Charles Lange-Pearson

David Lee Hermsmeier

Randall Scott Nelson

Suraj Subramanian

Mark Q Llacuna

Chung Meng

Daniel E Pradilla

Renato John Recio

Christoph Raisch

Richard Edwin Harper

Chih-Jen Chang

Michael Robert Turner

Henry Joseph May

Andrew Thomas Tauferner

Andrew T Koch

Jonathan Louis Kaus

Patrick Leo Caporale

David Lee Dosch

Oliver Raff

Scott J Timmerman

Mark Harrison Goff

Michael Anthony Migliacio

Russel Roy Garvey

Oliver M Voigt

Rekha Mundhra

Chetan S Yaliwal

Theodore Brian c/o Ibm United Kingdom Limited Vojnovich

Scott Randall Nelson

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

An approach is provided in which an Infrastructure as a Service (IaaS) system is established in a cloud that includes a plurality of virtual machines. Each of the plurality of virtual machines are allocated to one or more of a plurality of datastores based on one or more user inputs. Next, one of a plurality of priorities are assigned to each of the plurality of virtual machines based on the one or more of the plurality of datastores to which each of the plurality of virtual machines is allocated. In turn, the virtual machines are recovered in the cloud in an order determined, at least in part, by their assigned one of the plurality of priorities.

Extending deployed cloud infrastructure for disaster recovery sequencing

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 mechanism is provided for disaster recovery of managed systems. Responsive to an identification of a virtual machine recovery condition occurring at a first node site, one or more virtual machines to be recovered to a second site node are identified. Further responsive to the identification of the virtual machine recovery condition occurring at the first node site and responsive to the identification of the one or more virtual machines to be recovered, at least some of records/metadata state data associated with the one or more virtual machines are transmitted to the second site node.

Disaster recovery of managed systems

A method, executed by a computer, for allocating resources includes assigning resiliency attributes to a server having a workload, linking each server to a partner resource, duplicating the workload of each server in an offsite location accessible to the partner resource, detecting a disaster event, and transferring the workload of the server automatically to the partner resource. In some embodiments, the partner resource is a plurality of pool servers. The partner resource may be calculated by performing a capacity analysis. The partner resource may not a specifically assigned resource until a disaster occurs. In some embodiments, the workload is duplicated such that the recovery point objective of the workload is minimized. A computer program product and computer system corresponding to the methods are also disclosed herein.

Allocating and managing cloud computing resources for disaster recovery

In an approach for provisioning a server utilizing a virtual consistency group, a processor receives a request to provision a first server utilizing a first application consistency group, wherein the first application consistency group is a virtualized consistency group. A processor defines a storage consistency group. A processor assigns the first application consistency group to the storage consistency group. A processor provisions the first server. A processor assigns to the provisioned first server, storage specified by the first application consistency group.

Virtualization of consistency groups

Methods, computer program products, and systems to assist in distribution of packets between a plurality of switch elements in a distributed switch, by monitoring an attribute of each of the plurality of switch elements including a first switch element and a first surrogate switch element, the first surrogate switch element in a first level of a hierarchy and configured using a default hierarchy configuration, the default hierarchy configuration forwarding a data frame to at least one of: a destination switch element of the data frame, and a second surrogate switch element, the second surrogate switch element in a second hierarchy level; computing a score, based on the monitored attribute, for each of the switch elements; and upon determining the score of the first switch element is greater than the score of the first surrogate switch element, designating the first switch element as the first surrogate switch element.

System guided surrogating control in broadcast and multicast

Techniques are provided for retrieving entries from a routing table or a forwarding database in a distributed network switch. The forwarding database includes match and mask registers used to compare routing entries and return matching routing entries to a requesting management controller. The forwarding database uses a separate timeout value associated with the forwarding database to avoid timeout errors for general register operations, and allows for an asynchronous dump operation of routing entries.

Smart dumping of network switch forwarding database

Techniques are provided for providing access control lists in a distributed network switch. The distributed network switch made of switch units is divided into logical switch partitions, or logical networks. Physical ports of the switch units are partitioned into logical ports, where each logical port is associated with a logical switch partition. A control point of the distributed network switch manages and assigns a service tag (S-Tag) used to identify which logical port ingress and egress frames are associated with. To generate metrics and other forwarding actions for a given logical switch partition, the control point sets up access control list (ACLs) targeting the logical port associated with the S-Tags associated with the given logical switch partition.

Metrics and forwarding actions on logical switch partitions in a distributed network switch

Systems and methods to analyze layer-2 data frame switch forwarding are provided. A first switch may be coupled to a second switch. The first switch may maintain state information mirroring the state of the second switch. A sequence number may be appended to a data frame that is received at the first switch. Forwarding compliance of the second switch may be determined by analyzing a runtime attribute of the first switch.

Data link layer switch frame forwarding analysis

A method and apparatus for establishing multiple network sessions over an arbitrary network topology comprises receiving network configuration information describing an initiator system and a target controller. The initiator system contains one or more initiator ports. The target controller contains one or more target ports. Each target port is associated with one or more target nodes. A set of pre-defined rules is identified. The set of pre-defined rules governs the establishment of network sessions between the initiator ports and the target nodes through the target ports. One or more network sessions are established based on the set of pre-defined rules and the network configuration information.

Automatic multipath iSCSI session establishment over an arbitrary network topology

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Rochester, MN, United States of America

Josep Cors