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    Method and apparatus for detection of port name in a loop network
    3.
    发明专利
    Method and apparatus for detection of port name in a loop network 未知

    公开(公告)号：GB2384405B

    公开(公告)日：2004-10-06

    申请号：GB0201212

    申请日：2002-01-19

    Applicant: IBM

    Inventor： BEER REGINALD ,  CASHMAN PAUL NICHOLAS ,  HOOTON PAUL ,  MORRIS NEIL ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE

    IPC: H04L12/42 ,  H04L12/423 ,  H04L12/437

    Abstract: A method and apparatus for detection of a port name in a loop network is provided, particularly a loop network in the form of a Fibre Channel Arbitrated Loop (FC-AL). The loop network ( 100 ) has a plurality of devices ( 120 ) each device ( 120 ) having at least one port ( 211, 212 ) on the loop network ( 100 ). The method includes determining which ports ( 211, 212 ) are populated with devices ( 120 ) for which the unique port name (WWPN) is not known. The populated ports are then all bypassed and a mode is entered on the loop network ( 100 ) in which idle frames are transmitted around the loop network ( 100 ). One port is un-bypassed at a time and the port name from the un-bypassed port is received and recorded. The port name is received from the un-bypassed port in a Loop Initialisation Select Master (LISM) frame transmitted by the un-bypassed port.

    DATA PROCESSING SYSTEMS
    4.
    发明专利
    DATA PROCESSING SYSTEMS 未知

    公开(公告)号：AU2003251057A1

    公开(公告)日：2004-06-23

    申请号：AU2003251057

    申请日：2003-08-13

    Applicant: IBM

    Inventor： CASHMAN PAUL NICHOLAS ,  FUENTE CARLOS FRANCISCO ,  SCALES WILLIAM JAMES

    IPC: H04J3/16 ,  H04L12/56 ,  H04L47/722 ,  H04L49/901

    Abstract: Systems for transmitting an application message between nodes of a clustered data processing system are disclosed. One system includes a determination of whether one or more application messages may currently be transmitted to a first node of a plurality of nodes from a second node of the plurality of nodes. The system further includes processing the one or more application messages in response to a determination that the one or more application messages may be currently transmitted.

    Methods and apparatus for recovery from faults in a loop network
    5.
    发明专利
    Methods and apparatus for recovery from faults in a loop network 未知

    公开(公告)号：GB2377144B

    公开(公告)日：2004-11-10

    申请号：GB0117092

    申请日：2001-07-13

    Applicant: IBM

    Inventor： BEER REGINALD ,  CASHMAN PAUL NICHOLAS ,  JUDD IAN DAVID ,  HOOTON PAUL ,  MADDOCK ROBERT FRANK ,  MORRIS NEIL ,  NICHOLSON ROBERT BRUCE ,  WHYTE BARRY DOUGLAS

    IPC: H04L12/437 ,  H04L45/28

    Abstract: A method and apparatus for recovery from faults in a loop network (500) is provided. The loop network (500) has a plurality of ports (520, 530, 532, 534) serially connected with means for bypassing the ports (520, 530, 532, 534) from the loop network (500). A control device (522, 524) is provided with bypass control over at least one of the ports (530, 532, 534). A host means (502) sends a command to the control device (522, 524) at regular intervals and the control device (522, 524) has a counter which restarts a time period at the receipt of each command. If the time period expires, the control device (522, 524) activates the means for bypassing all the ports (530, 532, 534) under its control. The loop network (500) may have two loops (516, 518) with at least some of the ports (520, 530, 532, 534) common to both loops (516, 518).

    Method and apparatus for improving performance of a loop network by selectively bypassing redundant ports and also bypassing faulty ports
    6.
    发明专利
    Method and apparatus for improving performance of a loop network by selectively bypassing redundant ports and also bypassing faulty ports 未知

    公开(公告)号：GB2378621A

    公开(公告)日：2003-02-12

    申请号：GB0119069

    申请日：2001-08-06

    Applicant: IBM

    Inventor： CASHMAN PAUL NICHOLAS ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE ,  VEAL MICHAEL

    IPC: H04L12/437

    Abstract: A method and apparatus for improving performance of a loop network (400), in particular a Fibre Channel Arbitrated Loop. The loop network (400) has two loops (406, 408) and a plurality of dual ported devices (410) each with one port (411, 412) on each loop (406, 408) . The method includes selectively bypassing redundant ports on the loops (406, 408) by a first command means in the form of a Fibre Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports (411, 412) in each loop (406, 408). In the event of a fault, bypassing the port of a device (410) by a second command means in the form of a non Fibre Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.

    Fault location in a loop network
    7.
    发明专利
    Fault location in a loop network 未知

    公开(公告)号：GB2376612A

    公开(公告)日：2002-12-18

    申请号：GB0114614

    申请日：2001-06-15

    Applicant: IBM

    Inventor： CASHMAN PAUL NICHOLAS ,  NICHOLSON ROBERT BRUCE ,  MADDOCK ROBERT FRANK ,  BEER REGINALD ,  MORRIS NEIL ,  JUDD IAN DAVID ,  WHYTE BARRY DOUGLAS ,  HOOTON PAUL

    IPC: H04L12/24 ,  H04L12/437 ,  H04L12/42 ,  H04L12/26

    Abstract: A method and apparatus are provided for fault location in a loop or ring network (100, 200, 400) . The network system having a host port (214) for supplying and receiving data and a plurality of successively connected ports (201, 202, 203, 204, 205) through which data from the host port (214) is transferred. A counter (122) for each port records data transfers in which the amount of data received at a destination port is less than an expected amount of data. When a transfer with less than the expected amount of data is identified for a data flow between a sending port (201) and a destination port (214), the counters are incremented for each port (202, 203, 204, 205, 214) after the sending port up to and including the destination port. Analysing means determines a fault location in the network system from the distribution of counts in the counters (122).

    Method and apparatus for recovery from faults in a loop network
    8.
    发明专利
    Method and apparatus for recovery from faults in a loop network 未知

    公开(公告)号：GB2377140B

    公开(公告)日：2005-01-19

    申请号：GB0115969

    申请日：2001-06-29

    Applicant: IBM

    Inventor： BEER REGINALD ,  CASHMAN PAUL NICHOLAS ,  HOOTON PAUL ,  JUDD IAN DAVID ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE ,  WHYTE BARRY DOUGLAS

    IPC: H04L12/437 ,  H04L45/28

    Abstract: A method and apparatus for recovery from faults in a loop network (500) is provided. The loop network (500) has a plurality of ports (520, 530, 532, 534) serially connected with means for bypassing the ports (520, 530, 532, 534) from the loop network (500). A control device (522, 524) is provided with bypass control over at least one of the ports (530, 532, 534). A host means (502) sends a command to the control device (522, 524) at regular intervals and the control device (522, 524) has a counter which restarts a time period at the receipt of each command. If the time period expires, the control device (522, 524) activates the means for bypassing all the ports (530, 532, 534) under its control. The loop network (500) may have two loops (516, 518) with at least some of the ports (520, 530, 532, 534) common to both loops (516, 518).

    Method and apparatus for improving performance of a loop network
    9.
    发明专利
    Method and apparatus for improving performance of a loop network 未知

    公开(公告)号：GB2378621B

    公开(公告)日：2004-11-10

    申请号：GB0119069

    申请日：2001-08-06

    Applicant: IBM

    Inventor： CASHMAN PAUL NICHOLAS ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE ,  VEAL MICHAEL

    IPC: H04L12/437

    Abstract: A method and apparatus for improving performance of a loop network, in particular a Fiber Channel Arbitrated Loop. The loop network has two loops and a plurality of dual-ported devices each with one port on each loop. The method includes selectively bypassing redundant ports on the loops by a first command means in the form of a Fiber Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports in each loop. In the event of a fault, bypassing the port of a device by a second command means in the form of a non Fiber Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.

    Method and apparatus for fault location in a loop network
    10.
    发明专利
    Method and apparatus for fault location in a loop network 未知

    公开(公告)号：GB2376612B

    公开(公告)日：2004-06-09

    申请号：GB0114614

    申请日：2001-06-15

    Applicant: IBM

    Inventor： CASHMAN PAUL NICHOLAS ,  NICHOLSON ROBERT BRUCE ,  MADDOCK ROBERT FRANK ,  BEER REGINALD ,  MORRIS NEIL ,  JUDD IAN DAVID ,  WHYTE BARRY DOUGLAS ,  HOOTON PAUL

    IPC: H04L12/24 ,  H04L12/437 ,  H04L12/42 ,  H04L12/26

    Abstract: A method and apparatus are provided for fault location in a loop network ( 100, 200, 400 ). The network system having a host port ( 214 ) for supplying and receiving data and a plurality of successively connected ports ( 201, 202, 203, 204, 205 ) through which data from the host port ( 214 ) is transferred. A counter ( 122 ) for each port records data transfers in which the amount of data received at a destination port is less than an expected amount of data. When a transfer with less than the expected amount of data is identified for a data flow between a sending port ( 201 ) and a destination port ( 214 ), the counters are incremented for each port ( 202, 203, 204, 205, 214 ) after the sending port up to and including the destination port. Analysing means determines a fault location in the network system from the distribution of counts in the counters ( 122 ).

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