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Browse Prior Art Database

Interim Host Attachment

IP.com Disclosure Number: IPCOM000046560D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Ryder, KD: AUTHOR

Abstract

SNA (Systems Network Architecture) networks may be interconnected by using the Multi-Systems Network Facility (MSNF) of the standard Advanced Communications Function (ACF) products. One consequence of using ACF/MSNF is that one network may activate logical and physical resources which are normally owned by another network. This activation process between networks allows one network to back-up another network in certain failure situations. In some environments, cross-network activation may be undesirable and may have unpredictable results. These activations may allow a network to inspect or modify data and functions within another network. The IBM Information Network represents an environment in which multiple networks will be joined using ACF/MSNF capabilities.

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Interim Host Attachment

SNA (Systems Network Architecture) networks may be interconnected by using the Multi-Systems Network Facility (MSNF) of the standard Advanced Communications Function (ACF) products. One consequence of using ACF/MSNF is that one network may activate logical and physical resources which are normally owned by another network. This activation process between networks allows one network to back-up another network in certain failure situations. In some environments, cross-network activation may be undesirable and may have unpredictable results. These activations may allow a network to inspect or modify data and functions within another network. The IBM Information Network represents an environment in which multiple networks will be joined using ACF/MSNF capabilities. In general, there is no desire or intent to provide cross-network activations and back-up. Therefore, the Interim Host Attachment (IHA) capability has been developed to prevent activations from networks not authorized to issue such activations. IHA is implemented by IBM Information Network modifications to the ACF/NCP (Network Control Program). These modifications allow the generation process to identify selected links as IHA- monitored links. These are typically the links which are used to connect other SNA networks to the IBM Information Network. The IHA function will monitor inbound traffic from these links for any SNA ACTIVATE PHYSICAL UNIT (ACTPU) commands. These commands are n...