Jorge Rafael Nogueras

US Patent:

7492704, Feb 17, 2009

Filed:

Sep 15, 2005

Appl. No.:

11/227033

Inventors:

Vinit Jain - Austin TX, US
Jorge Rafael Nogueras - Austin TX, US
Vasu Vallabhaneni - Austin TX, US
Patrick Tam Vo - Houston TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04J 1/16

US Classification:

370216, 370218, 370221

Abstract:

A method, data processing system, and computer usable code are provided for protocol definition for software bridge failover. In a first aspect of the present invention, a first software bridge determines the proper working operation of a physical adapter. Limbo packets are sent to a second software bridge alerting the second software bridge that the first software bridge is no longer bridging traffic responsive to the physical adapter failure in the first software bridge. The second software bridge receives the limbo packets, and, in response to receiving the limbo packets, asserts primary control and initiates bridging of traffic. In an alternative aspect of the present invention a first software bridge sends keep-alive packets. A second software bridge monitors the keep-alive packets from the first software bridge and, in response to a failure to detect the keep-alive packets from the first software bridge, the second software bridge initiates bridging of traffic.

US Patent:

7496052, Feb 24, 2009

Filed:

Oct 27, 2005

Appl. No.:

11/260583

Inventors:

Vinit Jain - Austin TX, US
Jorge R. Nogueras - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 12/28

US Classification:

370254

Abstract:

A method, system and network protocol that enables each host within a virtual local area network (VLAN) environment to automatically discover to which VLANs the host belongs. When a host initially sets up a communication interface, the host generates a series of probing packets, each including a different one of the range of possible VLAN IDs within the packet header. The probing packet requests a response from the switch indicating whether the corresponding VLAN (identified by the VLAN ID) is supported by the switch. The switch automatically drops any packets with a VLAN ID not recognized/supported/configured in the switch. The destination device only receives supported packets, and thus the interface only receives a response for those request packets having a VLAN ID associated with a supported VLAN. The host's interface then knows which VLAN ID(s) are supported, and the host assigns/utilizes only those VLAN IDs for outgoing traffic.

US Patent:

7793139, Sep 7, 2010

Filed:

Dec 12, 2006

Appl. No.:

11/609641

Inventors:

Vinit Jain - Austin TX, US
Jorge Rafael Nogueras - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 4

Abstract:

A computer-implemented method, an apparatus, and a computer-usable program product for identifying a link status for a virtual adapter in a logical partition framework are provided. A partition management firmware receives a signal identifying a communication disruption in a link associated with the virtual adapter within the logical partition framework. The partition management firmware identifies which links associated with the virtual adapter are affected by the communication disruption. Responsive to identifying that only a physical link associated with the virtual adapter is disrupted, the partition management firmware categorizes the link status for the virtual adapter as partial link-down. Responsive to identifying that both the physical link and a virtual link associated with the virtual adapter are disrupted, the partition management firmware categorizes the link status for the virtual adapter as link-down.

US Patent:

8036102, Oct 11, 2011

Filed:

Jun 2, 2008

Appl. No.:

12/131500

Inventors:

Vinit Jain - Austin TX, US
Jorge Rafael Nogueras - Austin TX, US
Vasu Vallabhaneni - Austin TX, US
Patrick Tam Vo - Houston TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04J 1/16

US Classification:

370216, 370218, 370221

Abstract:

A method, data processing system, and computer usable code are provided for protocol definition for software bridge failover. In a first aspect of the present invention, a first software bridge determines the proper working operation of a physical adapter. Limbo packets are sent to a second software bridge alerting the second software bridge that the first software bridge is no longer bridging traffic responsive to the physical adapter failure in the first software bridge. The second software bridge receives the limbo packets, and, in response to receiving the limbo packets, asserts primary control and initiates bridging of traffic. In an alternative aspect of the present invention a first software bridge sends keep-alive packets. A second software bridge monitors the keep-alive packets from the first software bridge and, in response to a failure to detect the keep-alive packets from the first software bridge, the second software bridge initiates bridging of traffic.

US Patent:

8189488, May 29, 2012

Filed:

Mar 31, 2008

Appl. No.:

12/059650

Inventors:

Vinit Jain - Austin TX, US
Jorge Rafael Nogueras - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01R 31/08

US Classification:

370245, 370218, 710 62

Abstract:

Methods, systems, and program products are provided for failback to a primary communications adapter. Embodiments of the present invention include receiving, in a driver for a primary communications adapter and a backup communications adapter, a link up event for the primary communications adapter; inferring that the primary communications adapter is capable of receiving packets; setting the backup communications adapter to idle; and activating the primary communications adapter. In typical embodiments, the primary communications adapter includes a plurality of linked communications adapters comprising an EtherChannel pseudo-adapter.

US Patent:

8195867, Jun 5, 2012

Filed:

Mar 13, 2009

Appl. No.:

12/403472

Inventors:

David A. Hepkin - Austin TX, US
Carol B. Hernandez - Austin TX, US
Andrew T. Koch - Rochester MN, US
Kyle A. Lucke - Oronoco MN, US
Naresh Nayar - Rochester MN, US
Jorge R. Nogueras - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/08

US Classification:

711 6, 711153, 711173, 711203, 711E12016

Abstract:

Controlled partition shut-down is provided within a shared memory partition data processing system including a shared memory partition, a paging service partition, a hypervisor and a shared memory pool within physical memory. The hypervisor manages access to logical pages within the pool and page-out of pages from the pool to external paging storage via the paging service partition. A respective paging service stream exists between the paging service partition and hypervisor for each shared memory partition, with each stream including a stream state. The control method includes: responsive to a shut-down initiating event, notifying the paging service partition to shut down, and determining whether a shared memory partition is currently active, and if so, signaling the hypervisor to complete paging activity for the active memory partition and waiting for its stream state to enter a suspended or a completed state before automatically shutting down the paging service partition.

US Patent:

8225068, Jul 17, 2012

Filed:

Jun 9, 2008

Appl. No.:

12/135508

Inventors:

Jorge Rafael Nogueras - Austin TX, US
James A. Pafumi - Leander TX, US
Morgan Jeffrey Rosas - Cedar Park TX, US
Vasu Vallabhaneni - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711203, 711173

Abstract:

A computer implemented method, apparatus, and program product for extending virtual memory associated with logical partitions. A hosting partition receives a paging request from a logical partition on a logically partitioned data processing. The hosting partition identifies a location of the physical memory space on a remote computing device assigned to the logical partition and sends an extended virtual memory paging request to an extended virtual memory manager located on the remote computing device using a network connection. The extended virtual memory paging request comprises the instructions for the memory page-in or the memory page-out and the location of the physical memory space on the remote computing device that is being paged-in or paged-out. The extended virtual memory manager performs a page-in operation or a page-out operation in accordance with the instructions for the memory page-in or memory page-out.

US Patent:

8295290, Oct 23, 2012

Filed:

Sep 3, 2009

Appl. No.:

12/553158

Inventors:

Omar Cardona - Austin TX, US
James Brian Cunningham - Austin TX, US
Jorge Rafael Nogueras - Austin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370400

Abstract:

Where parallel links between network devices are aggregated into link groups to support the transport of associated data streams, the link groups can be managed in an energy efficient manner by defining each link group as consisting of a primary link and one or more secondary links. The primary link in a link group remains enabled at all times but the secondary links are enabled only when needed and are disabled when no longer needed, minimizing power consumption for the secondary links (and the link group).