| 摘要 |
A label switching method is provided. When a Passive Optical Network (PON)-based Label Switching Path (LSP) is established, a PON logical service transmission channel is established between an Optical Line Terminal (OLT) and an Optical Network Unit (ONU). According to an identifier (ID) of the PON logical service transmission channel as a PON label, a PON-based Forwarding Information Base (FIB) table on the ONU is updated, and a PON-based Label Forwarding Information Base (LFIB) table on the OLT is updated, where the PON-based LFIB table records a forwarding relationship between an ingress port plus an ingress label and an egress port plus an egress label, and the PON-based FIB table records a forwarding relationship between the ingress port plus a destination address and the egress port plus the egress label. Therefore, the problems between network segments of different forwarding characteristics, protocol variation, inter-segment conversion, and mapping and control complexity are avoided.
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