embodiment of the invention discloses a peripheral component interconnect high speed interface control unit. Peripheral component interconnect high speed interface control unit, root complex (RC) or terminal device (EP) receiving a first transaction layer packet (TLP) from and reliable TLP transmitted for processing the first TLP (RTT ) comprises a PCI-to-PCI bridge in the P2P module is configured to forward and modules; The reliable TLP transmission (RTT) module, according to the received claim 1 TLP, active and standby PCIE switching determines the transmission link to the unit, the active and standby for the first 1 TLP over the transmission link PCIE It is configured in the switching unit to transmit at the same time, and thus the destination PCIE interface controller of claim 1 TLP is selectively receiving the first 1 TLP forwarded by the active and standby PCIE switching unit according to the destination of the first 1 TLP EP or 1 and sends the TLP to the destination RC, thereby executes the transfer of trusted TLP in the case of a dual plane switching PCIE network connection, by using the PCIE switching increases the reliability of the system. Embodiment of the present invention also discloses a method for packet transmission from the PCIE switching network, system, and storage medium. ;
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