New DBS3900 LTE FDD site cannot ping core network

Hi dear,
1. Check whether the physical link is normal, you can view the indicators of the BBU transmission port or perform the MML command(DSP SFP) to query status of transmission port
2. Check whether the IP route is the same as the planing by perfore the MML command(LST IPRT).
3. Use the command (DSP ETHPORT) to query the status of the port, check whether the configuration of the rate and duplex mode of the transmission port is the same as that of the core network