International Business Machines Corporation

Atef O Zaghloul

John H Zeiger

Bruce Booth

Jean Louis Calvignac

Clark Debs Jeffries

Marco C Heddes

Piyush Chunilal Patel

Ross Boyd Leavens

Gerald Arnold Marin

Eric LeBrun

Gregg W Machovec

Joseph D Robinson

William B Chalk, Iii

David W Chow

Mark E Goodgion

Timothy A Goodacre

A method, system and service for a data center computer network. A core network switches data using a first protocol layer. A first access switch is in electrical communication with the core network. The first access switch communicates the data to the core network using the first protocol layer. A second redundant access switch forms a first access switch pair with the first access switch. The second access switch is in electrical communication with the core network and communicates the data using the first protocol layer. The second access switch is in electrical communication with first access switch and communicates with the first access switch using a second protocol layer. The second protocol layer is at lower OSI level than the first protocol layer. The first access switch and the second access switch are configured to form a first VLAN. A first edge device is in electrical communication with the first access switch and the second access switch. The first edge device is part of the first VLAN.

Data center virtual local area network system and method

A method, system and program product for equitable sharing of a CAM (Content Addressable Memory) table among multiple users of a switch. The method includes reserving buffers in the table to be shared, the remaining buffers being allocated to each user. The method further includes establishing whether or not an address contained in a packet from a user is listed in a buffer in the table, if the address is listed, updating a time-to-live value for the buffer for forwarding the packet and, if the address is not listed, determining whether or not the user has exceeded its allocated buffers and whether or not the reserved buffers have been exhausted, such that, if the user has exceeded its allocated buffers and the reserved buffers have been exhausted, the address is not added to the table and the user is precluded from using any additional buffers in the network switch.

Method, system and program product for equitable sharing of a CAM table in a network switch in an on-demand environment

Methods systems and computer program products are provided for hashing address values that exhibit banding in a plurality of regions of an address space defined by at least two segments of the address values, by performing at least one of a translation and a rotation of the at least two segments to thereby map the at least two segments from the plurality of regions to one of the plurality of regions.

Methods, systems and computer program products for hashing address values

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Morrisville, NC, United States of America

Atef O Zaghloul