公开(公告)号：GB2384405A

公开(公告)日：2003-07-23

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 has a plurality of devices each device having at least one port on the loop network. The method includes determining which ports are populated with devices for which the unique port name (WWPN) is not known 302. The populated ports are then all bypassed 303 and a mode is entered on the loop network in which idle frames are transmitted around the loop network. 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.

公开(公告)号：GB2377144A

公开(公告)日：2002-12-31

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 (400) is provided. The loop network (400) has a host means (402), a first loop and a second loop (406, 408), a plurality of ports (410) connected to each of the loops (406, 408) and a control device (414, 440) on or connected to each loop (406, 408) with bypass control over at least one of the ports (410) connected to the loop (406, 408). In the event of a failure on the first loop (406), the host means (402) instructs the bypassing of at least one port (410) on the first loop (406), the host means (402) sending the instructions via the control device (414, 440) on or connected to the second loop (408). The host means (402) may determine the physical topology of the ports (410) on the first and second loops (406, 408) such that when a failure is reported to the host means (402) by a port (432) on the first loop (406), the host means (402) instructs the bypassing of a port (434) in a specific relationship to the reporting port (432) on the first loop (434). The host means (402) may instruct the bypassing of all ports (416) on the first loop (406) and subsequently selectively un-bypass ports (416) to ascertain the location of a faulty port or ports.