公开(公告)号：DE60015186T2

公开(公告)日：2006-02-02

申请号：DE60015186

申请日：2000-12-21

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  DAVIS TAYLOR ,  GALLO MATTEO ,  HEDDES MARCO ,  JENKINS KENNETH ,  LEAVENS BOYD ,  SIEGEL STEVEN ,  VERPLANKEN JEAN

IPC: G06F9/46 ,  H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L45/60

Abstract: A system and method of frame protocol classification and processing in a system for data processing (e.g., switching or routing data packets or frames). The present invention includes analyzing a portion of the frame according to predetermined tests, then storing key characteristics of the packet for use in subsequent processing of the frame. The key characteristics for the frame (or input information unit) include the type of layer 3 protocol used in the frame, the layer 2 encapsulation technique, the starting instruction address, flags indicating whether the frame uses a virtual local area network, and the identity of the data flow to which the frame belongs. Much of the analysis is preferably done using hardware so that it can be completed quickly and in a uniform time period. The stored characteristics of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address and the location of the beginning of the layer 3 header as well as flags for the type of frame. That is, the instruction address or code entry point is used by the processor to start processing for a frame at the right place, based on the type of frame. Additional instruction addresses can be stacked and used sequentially at branches to avoid additional tests and branching instructions. Additionally, frames comprising a data flow can be processed and forwarded in the same order in which they are received.

公开(公告)号：DE60109027D1

公开(公告)日：2005-03-31

申请号：DE60109027

申请日：2001-03-30

Applicant: IBM

Inventor： GORTI KUMAR ,  HWANG DONGMING ,  JEFFERIES DEBS ,  SIEGEL STEVEN ,  SUDEEP KARTIK

IPC: H04L12/54 ,  H04L12/70 ,  H04Q11/04 ,  H04L12/56

Abstract: A method and system for controlling a plurality of sub-pipes in a computer network is disclosed. The computer network includes at least one switch. The plurality of sub-pipes utilizes the switch for transmitting traffic through the network. The method and system include allowing a minimum flow to be set for each of the plurality of sub-pipes and determining whether congestion exists for the pipe. The method and system also include controlling a flow in a sub-pipe of the plurality of sub-pipes only if congestion exists. Once congestion is determined to exist, the time set to control of sub-pipes is set significantly longer than for control over individual decreases or increases of the flows in sub-pipes. The flow is controlled such that the flow for the sub-pipe may be linearly increased if the flow for the sub-pipe of the plurality of sub-pipes is less than the minimum flow. The flow is also controlled such that the flow for the sub-pipe of the plurality of sub-pipes is exponentially decreased if the flow is greater than the minimum flow. In determining whether to increase or decrease the flow in a sub-pipe, a second definition of congestion may be used. Thus the traffic through the switch is stable.

公开(公告)号：DE60015186D1

公开(公告)日：2004-11-25

申请号：DE60015186

申请日：2000-12-21

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  DAVIS TAYLOR ,  GALLO MATTEO ,  HEDDES MARCO ,  JENKINS KENNETH ,  LEAVENS BOYD ,  SIEGEL STEVEN ,  VERPLANKEN JEAN

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L45/60 ,  G06F9/46 ,  H04L29/06

Abstract: A system and method of frame protocol classification and processing in a system for data processing (e.g., switching or routing data packets or frames). The present invention includes analyzing a portion of the frame according to predetermined tests, then storing key characteristics of the packet for use in subsequent processing of the frame. The key characteristics for the frame (or input information unit) include the type of layer 3 protocol used in the frame, the layer 2 encapsulation technique, the starting instruction address, flags indicating whether the frame uses a virtual local area network, and the identity of the data flow to which the frame belongs. Much of the analysis is preferably done using hardware so that it can be completed quickly and in a uniform time period. The stored characteristics of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address and the location of the beginning of the layer 3 header as well as flags for the type of frame. That is, the instruction address or code entry point is used by the processor to start processing for a frame at the right place, based on the type of frame. Additional instruction addresses can be stacked and used sequentially at branches to avoid additional tests and branching instructions. Additionally, frames comprising a data flow can be processed and forwarded in the same order in which they are received.

公开(公告)号：DE60029467T2

公开(公告)日：2007-07-19

申请号：DE60029467

申请日：2000-08-24

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  GALLO MATTEO ,  HEDDES C ,  RAO SRIDHAR ,  SIEGEL STEVEN ,  YOUNGMAN ALAN ,  VERPLANKEN JEAN

IPC: G06F13/00 ,  G06F15/16 ,  G06F13/38 ,  G06F13/40 ,  G06F15/00 ,  G06F15/173 ,  G06F15/177 ,  G06F15/76 ,  H04L12/56

Abstract: An apparatus is disclosed for transporting control information in a communications system. The apparatus comprises a network processor, a control point processor operatively coupled to the network processor, and a guided frame generated by the control point processor. The guided frame comprises a first section in which frame control information is placed and is used by the network processor to update at least one control register within the network processor; a second section carrying correlators assigned by the control point processor to correlate guided frame responses with their requests; a third section carrying one or a sequence of guided commands; and an End delimiter guided command.

公开(公告)号：DE60029467D1

公开(公告)日：2006-08-31

申请号：DE60029467

申请日：2000-08-24

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  GALLO MATTEO ,  HEDDES C MARCO ,  RAO SRIDHAR ,  SIEGEL STEVEN ,  YOUNGMAN ALAN ,  VERPLANKEN JEAN

IPC: G06F13/00 ,  G06F15/16 ,  G06F13/38 ,  G06F13/40 ,  G06F15/00 ,  G06F15/173 ,  G06F15/177 ,  G06F15/76 ,  H04L12/56

Abstract: An apparatus is disclosed for transporting control information in a communications system. The apparatus comprises a network processor, a control point processor operatively coupled to the network processor, and a guided frame generated by the control point processor. The guided frame comprises a first section in which frame control information is placed and is used by the network processor to update at least one control register within the network processor; a second section carrying correlators assigned by the control point processor to correlate guided frame responses with their requests; a third section carrying one or a sequence of guided commands; and an End delimiter guided command.

公开(公告)号：DE60109027T2

公开(公告)日：2006-04-13

申请号：DE60109027

申请日：2001-03-30

Applicant: IBM

Inventor： GORTI KUMAR ,  HWANG DONGMING ,  JEFFERIES DEBS ,  SIEGEL STEVEN ,  SUDEEP KARTIK

IPC: H04L12/54 ,  H04L12/70 ,  H04Q11/04

Abstract: A method and system for controlling a plurality of sub-pipes in a computer network is disclosed. The computer network includes at least one switch. The plurality of sub-pipes utilizes the switch for transmitting traffic through the network. The method and system include allowing a minimum flow to be set for each of the plurality of sub-pipes and determining whether congestion exists for the pipe. The method and system also include controlling a flow in a sub-pipe of the plurality of sub-pipes only if congestion exists. Once congestion is determined to exist, the time set to control of sub-pipes is set significantly longer than for control over individual decreases or increases of the flows in sub-pipes. The flow is controlled such that the flow for the sub-pipe may be linearly increased if the flow for the sub-pipe of the plurality of sub-pipes is less than the minimum flow. The flow is also controlled such that the flow for the sub-pipe of the plurality of sub-pipes is exponentially decreased if the flow is greater than the minimum flow. In determining whether to increase or decrease the flow in a sub-pipe, a second definition of congestion may be used. Thus the traffic through the switch is stable.