Browse Prior Art Database

Method for Connecting Workstations to HOST Employing a Passthrough Technique

IP.com Disclosure Number: IPCOM000061340D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 3 page(s) / 36K

Publishing Venue

IBM

Related People

Clauson, RA: AUTHOR [+5]

Abstract

A connection method for a network controller is described which establishes a session directly between the host and the workstation, with the controller serving only to assist in connecting sessions, re-allocating them after disconnection, and routing traffic in between. The figure illustrates a network in which controller 10 functions in a passthrough mode. Details of the architecture of the network shown are set forth below. Controller 10 in passthrough mode does not retard traffic unnecessarily since path length is reduced by eliminating the need for a server application to act as an intermediary for recognizing and processing the host-to-workstation protocol. Controller 10 can be oblivious of host-workstation protocols and thus support many more kinds of connections since the need is eliminated for protocol conversion.

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Method for Connecting Workstations to HOST Employing a Passthrough Technique

A connection method for a network controller is described which establishes a session directly between the host and the workstation, with the controller serving only to assist in connecting sessions, re-allocating them after disconnection, and routing traffic in between. The figure illustrates a network in which controller 10 functions in a passthrough mode. Details of the architecture of the network shown are set forth below. Controller 10 in passthrough mode does not retard traffic unnecessarily since path length is reduced by eliminating the need for a server application to act as an intermediary for recognizing and processing the host-to-workstation protocol. Controller 10 can be oblivious of host-workstation protocols and thus support many more kinds of connections since the need is eliminated for protocol conversion. GET PATH

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GET_PATH. This command requests the specified server to obtain or allocate a session with the specified host. This command builds, and passes to the BIOS of the specified LANA, an NCB having NCB_COMMAND = SEND. NCB_CALLNAME contains the argument specified in SERVER. NCB_LSN is that obtained from a previous CALL. NCB_BUFFER points to a message which contains a GET_PATH command code followed by the argument specified in HOST followed by any argument specified in PROTOCOL. After issuing the SEND, this command builds, and passes to the BIOS of the same LANA, an NCB having the same NCB_CALLNAME, with NCB_ COMMAND = RECEIVE, and with NCB_BUFFER pointing to BUFFER. GIVE PATH

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GIVE_PATH. This command is the response to GET_PATH. This command builds, and passes to the BIOS of the sp...