IN IN3842KON2013A
Embodiments of the present invention disclose a peripheral component interconnect express interface control unit. The peripheral component interconnect express interface control unit includes a PCI to PCI bridge P2P module, configured to receive a first transaction layer packet TLP from a root complex RC or an endpoint device EP and forward the first TLP to a reliable TLP transmission RTT module for processing; the reliable TLP transmission module, configured to determine, according to the received first TLP, sending links connected to active and standby PCIE switching units, and send the first TLP to the active and standby PCIE switching units through the sending links at the same time, so that a destination PCIE interface controller of the first TLP selectively receives the first TLP forwarded by the active and standby PCIE switching units and sends the first TLP to a destination EP or a destination RC of the first TLP, thereby implementing reliable transmission of a TLP in a case of a PCIE switching dual-plane networking connection, and improving reliability of a system using PCIE switching. The embodiments of the present invention further disclose a method, system, and storage medium for packet transmission in a PCIE switching network.
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