According to different network situations, OSI over DCC has two major applications.
As shown in Figure 1, Huawei equipment locates at the edge of the network and third-party equipment locates at the core. The third-party equipment forwards the OAM information between Huawei equipment and the Huawei U2000 Web LCT. In this case, at least one GNE should be configured in the subnet of the Huawei equipment.
As shown in Figure 2, Huawei equipment locates at the core of the network while third-party equipment at the edge. Huawei equipment forwards the OAM information between the third-party NM and equipment.