Browse Prior Art Database

Dynamic Configuration Change

IP.com Disclosure Number: IPCOM000120139D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Zenhari, GR: AUTHOR

Abstract

Disclosed is a method of changing the operational mode of a fiber-optic switch. The fiber-optic switch in the RISC System/6000* system can operate in several modes. These modes are set up by the switch processor in the Port Configuration Register (PCR). The switch must be able to change the mode of operation immediately once it is requested by the processor in case of errors or configuration changes.

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Dynamic Configuration Change

      Disclosed is a method of changing the operational mode of
a fiber-optic switch.  The fiber-optic switch in the RISC
System/6000* system can operate in several modes.  These modes are
set up by the switch processor in the Port Configuration Register
(PCR).  The switch must be able to change the mode of operation
immediately once it is requested by the processor in case of errors
or configuration changes.

      In order to achieve this, a state machine was designed which
provides the necessary control signals to the main controller for the
switch.  Once the processor writes to the port control register, this
state machine sends the mode change signals to the main controller
and, in one clock cycle, the switch is in the desired mode.

      This method simplifies and reduces the logic for the main
control- ler, as well as other controllers, in the switch while
achieves the desired function in one clock cycle.
*  Trademark of IBM Corp.