Multiplex communications – Wide area network – Packet switching
Patent
1993-06-30
1995-06-06
Harvey, Jack B.
Multiplex communications
Wide area network
Packet switching
370 943, 370 60, H04J 324
Patent
active
054230063
ABSTRACT:
A computer I/O system which includes a dynamic switch having a plurality of ports and a plurality of link-level facilities, with each link-level facility being attached to an individual one of the ports. Whenever the state of a port or its attached link-level facility is changed in such a way that the attached link-level facility's ability to communicate with another link-level facility might be affected, this fact is recognized by a dynamic switch control unit which causes a state change notification (SCN) frame to be transmitted to all other link-level facilities which might be affected. The link-level facilities receiving such a state change notification then determine if any of the associations or potential associations with the link-level facility which caused the state change notification are affected.
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Brown Paul J.
Elliott Joseph C.
Hoppe Karl H.
Lynch Kenneth R.
Sachs Martin W.
Goldman Bernard M.
Harvey Jack B.
International Business Machines - Corporation
Myers Paul R.
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