| 摘要 |
<p>A label switching method is provided. When a Passive Optical Network (PON)-based Label Switching Path (LSP) (PON-based 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. When a data packet arrives at the ONU or the OLT, the ONU performs route selection according to the PON-based FIB table on the ONU, while the OLT performs forwarding and label switching respectively according to the PON-based FIB table and the PON-based LFIB table on the OLT. An OLT, an ONU, and a label switching system are also provided. Therefore, internal processing of mixed PON and Multi-protocol Label Switching (MPLS) label switching networks is greatly simplified, and problems between network segments of different forwarding characteristics, protocol variation, inter-segment conversion, and mapping and control complexity are avoided.</p> |
