Recovery from a possible switching error in a computer I/O system.

摘要

A connection recovery apparatus for placing a dynamic connection of a dynamic switch (10) of a computer I/O system in a known state upon the detection of a possible switching error. The I/O system includes transmitting stations each having a link-level facility (60-63) attached by a link to a dynamic-switch port (68, 72) of a dynamic-switch (10). The dynamic-switch makes (10) dynamic connections between any two of the stations. Upon the detection of a possible switching error, the detecting link-level facility (60-63) of a station or its attached dynamic-switch port (68, 72) starts a switch recovery procedure which places any dynamic connection to that station in a known disconnected state. <IMAGE>