Hi Rengar,
For the S5700 MIB of V200R013C00, dot1dTpFdbTable corresponds to the node 1.3.6.1.2.1.17.4.3.1.1.
For details about this node, visit the following website:
https://support.huawei.com/hedex/hdx.do?lib=EDOC1100064949DEI0130R&docid=EDOC1100064949&lang=en&v=05&tocLib=EDOC1100064949DEI0130R&tocV=05&id=dc_s_mib_bridge_0001&tocURL=resources%2fdc%2fdc%5fs%5fmib%5fbridge%5f0001%2ehtml&p=t&fe=1&ui=3&keyword=dot1dTpFdbTableYou are advised to check the version of the device. The node varies according to the version.
The NMS software can obtain dot1dTpFdbTable after the MIB file of the corresponding device is imported.
I hope it helps!