公开(公告)号：DE69122013T2

公开(公告)日：1997-03-13

申请号：DE69122013

申请日：1991-06-18

Applicant: IBM

Inventor： ELLIOTT JOSEPH CHARLES ,  HEFFERON EUGENE PAUL ,  MERITT ALLAN SAMUEL ,  SACHS MARTIN WILLIAM ,  SNEDAKER MARK CARL

IPC: G06F13/00 ,  G06F12/06 ,  G06F13/14 ,  G06F13/40 ,  G06F13/42 ,  G06F15/173 ,  H04L29/12

Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.

公开(公告)号：BR8903132A

公开(公告)日：1990-02-06

申请号：BR8903132

申请日：1989-06-27

Applicant: IBM

Inventor： CHISHOLM DOUGLAS RODERICK ,  ISEMINGER ROBERT GARIS ,  KELLEY RICHARD ALLEN ,  LEUNG WAN LIN ,  MOYER JAMES THEODORE ,  SNEDAKER MARK CARL

IPC: G06F13/36 ,  G06F13/28 ,  G06F13/00

公开(公告)号：DE69122013D1

公开(公告)日：1996-10-17

申请号：DE69122013

申请日：1991-06-18

Applicant: IBM

Inventor： ELLIOTT JOSEPH CHARLES ,  HEFFERON EUGENE PAUL ,  MERITT ALLAN SAMUEL ,  SACHS MARTIN WILLIAM ,  SNEDAKER MARK CARL

IPC: G06F13/00 ,  G06F12/06 ,  G06F13/14 ,  G06F13/40 ,  G06F13/42 ,  G06F15/173 ,  H04L29/12

Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.

公开(公告)号：BR8903172A

公开(公告)日：1990-02-13

申请号：BR8903172

申请日：1989-06-28

Applicant: IBM

Inventor： PECHANEK GERALD GEORGE ,  SHIPPY DAVID JAMES ,  SNEDAKER MARK CARL ,  WOODWARD SANDRA SUE

IPC: G06F13/20 ,  G06F13/36