公开(公告)号：JP2003046525A

公开(公告)日：2003-02-14

申请号：JP2002185595

申请日：2002-06-26

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーション

Inventor： GALLAGHER ROBERT J ,  ROONEY WILLIAM J

IPC: H04L12/44 ,  H04L12/56 ,  H04L29/08

CPC classification number: H04L49/351 ,  H04L49/101 ,  H04L67/1097 ,  H04L69/329

Abstract: PROBLEM TO BE SOLVED: To provide a method, apparatus, and computer program device enabling a computer network switching device for informing an attached requesting of switch ports affected by configuration changes during the period of time since the last query, by the particular requesting device. SOLUTION: The switching device is initialized with a change index and data vector, the latter indicative of an initial port configuration. The switch increments the index, in response to subsequent port configuration change events, and stores in association with the incremented index a data vector, indicating the ports changed during the corresponding event. The switch stores an array of associated index and vector values. The switch responds to a query from an attached requesting device, by informing the requesting device of specific ports affected by one or more configuration changes, since the index value held by the requesting device was the current index in the switch.

Abstract translation: 要解决的问题：提供一种方法，装置和计算机程序设备，其使得计算机网络交换设备能够通知特定请求设备在上一次查询之后的时间段期间通知由配置变化影响的交换机端口的附加请求。 解决方案：切换设备用变化索引和数据向量初始化，后者表示初始端口配置。 响应于后续端口配置更改事件，交换机增加索引，并且与增加的索引相关联地存储指示在相应事件期间更改端口的数据向量的数据向量。 交换机存储关联索引和向量值的数组。 交换机响应来自附加的请求设备的查询，通过向请求设备通知受一个或多个配置改变影响的特定端口，因为请求设备保持的索引值是交换机中的当前索引。

公开(公告)号：CA2029603A1

公开(公告)日：1991-05-29

申请号：CA2029603

申请日：1990-11-08

Applicant: IBM

Inventor： BAILEY CHRISTOPHER J ,  COX MICHAEL C ,  CWIAKALA RICHARD ,  DIRKS LYNN M ,  FIRM WILLIAM R ,  FISHER GARY A ,  GALLAGHER ROBERT J ,  HOPPE KARL H ,  KANIA PETER I ,  VALLEE LAWRAINE J

IPC: G06F13/14 ,  G06F13/40 ,  G06F15/173

Abstract: A computer system, including at least one host (processor and operating system), a channel subsystem and at least one switch (together with an associated switch controller) for switchably connecting an I/O device (together with an associated I/O device control unit) to a host via said channel subsystem, in combination with means for dynamically managing I/O connectivity in said computer from each host. The I/O manager's functions are centralized at the host level across the computer system. Each host is responsible for an instance of the manager. According to the preferred embodiment of the invention the computer system, I/O manager combination includes: (a) first means, located within each switch, for providing direct host access to the switch controller associated with a given switch; (b) second means, included in each host level instance of the manager, for automatically and dynamically determining the current I/O configuration and connectivity of each host; (c) third means, included in each host level instance of the manager, for performing System Integrated Switching (i.e., switching where any instance of the I/O manager can veto a proposed configuration change) and (d) fourth means, included in each host level instance of the manager, for insuring the integrity of the I/O connectivity database, through the use of an interlock mechanism, in a multiuser environment where each user can enter multiple part commands and processes concurrently.