公开(公告)号：MX9204928A

公开(公告)日：1993-03-01

申请号：MX9204928

申请日：1992-08-26

Applicant: IBM

Inventor： BROWN PAUL JOSEPH ,  FREDERICKS KENNETH JAMES ,  HEFFERON EUGENE PAUL ,  MOFFIT GERALD THOMAS ,  MERITT ALLAN SAMUEL

IPC: G06F13/00 ,  G06F13/14 ,  H04L29/00 ,  G06C7/00

Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.