Browse Prior Art Database

Communicating to a Control Port in a High-Speed Data Switch

IP.com Disclosure Number: IPCOM000100137D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 71K

Publishing Venue

IBM

Related People

Kaiser, JM: AUTHOR [+2]

Abstract

Disclosed is a method of providing a communication path to a high-speed data switch controller from any input port on the data switch. (Image Omitted). As shown in the figure, the data switch consists of port adapters (1), which are connected to a matrix switch element (2) via full duplex buses (5). These buses are connected dynamically to other port adapters in the switch to form short-term communication paths between the end nodes connected via links to these port adapters.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Communicating to a Control Port in a High-Speed Data Switch

       Disclosed is a method of providing a communication path
to a high-speed data switch controller from any input port on the
data switch.

                            (Image Omitted)

.  As shown in the
figure, the data switch consists of port adapters (1), which are
connected to a matrix switch element (2) via full duplex buses (5).
These buses are connected dynamically to other port adapters in the
switch to form short-term communication paths between the end nodes
connected via links to these port adapters.

      A switch such as this usually contains some intelligence to
perform initialization, configuration or maintenance functions.  This
intelligence is communicated to a controller, via a control port on
the switch.  If any end node wishes to communicate with this control
port to initiate any of the above functions, a communication path
needs to exist.  This article describes a method of using the
existing node to port links, port adapters and the matrix switch
elements to affect such a path.  A common control bus (3) can be seen
in the figure which connects the port adapters and the matrix switch
element and the control logic. This control bus is normally used to
establish the port connections through the matrix. To the matrix
switch element is added a RAM buffer (4) and controls to enable any
port adapter to write into the RAM and the RAM to be read out to
any port adapter when...