GRE message fragmentation recombination method and device

The invention relates to a GRE message fragment recombination method and device, and the method comprises the steps: configuring a GRE message fragment recombination module constructed based on an FPGA according to a transmission demand; enabling the GRE message fragmentation recombination module to receive the MPLS message from the switch chip, performing GRE encapsulation on the first message according to an LSP reservation label used for GRE tunnel identification in the MPLS message to obtain a GRE message, fragmenting the GRE message, and sending the GRE message fragments to a second network interface; and enabling the GRE message fragment recombination module to recombine the GRE message fragments received from the second network interface to obtain a GRE message, decapsulating the GRE message, encapsulates an LSP reservation label for the obtained first message to obtain an MPLS message, and sending the MPLS message to the switching chip. According to the invention, the problem that the GRE message tran