Thank you for your support in solving my problem. Now the problem is:
The server is powered off, the switch is disabled, and webreboot is in schedule. After tens of hours, the server is still powered off. How can I turn on the server?
Please help me, thank you very much!
My information:
Servername: srv20883
IPv6: 2a02:0180:0006:0001:0000:0000:0000:3d82
Thanks again!