Feedback system for packet switching device with bufferless cascaded switching matrix

A packet switching device with a switching network consisting of a plurality of bufferless switching matrices (6) and switching controllers (7) connected to form a matrix or cascade and each associated with a switching matrix (6), which switching controllers (7) each comprise at least

• one identifier analyzer (12) for identifying an input port in a route identifier associated with a packet and for storing connections already granted between input ports and output ports,
• one output arbiter (13) for evaluating at least one inquiry sent with a route identifier,
• one identifier grant analyzer (15) for analyzing and modifying the identifiers, coming from the output arbiter (13), of the granted inquiries,
• one input arbiter (16) for evaluating identified and granted inquiries,
• one result analyzer (17) for informing the identifier analyzer (12) about accepted connections,
• one inquiry cascader (18) for comparing and selecting a result determined locally by the output arbiter (13) and a result obtained by the previous switching controller (7), and
• one grant cascader (19) for comparing and selecting a result determined locally by the input arbiter (16) and a result obtained by the previous switching controller (7),
• the respective result being fed back to the at least one previous switching controller present in the matrix or cascade.