When the OceanStor 9000 storage system is deployed, the node cannot be discovered or displayed in red. The possible causes are as follows:

When the OceanStor 9000 storage system is deployed, the node cannot be discovered or displayed in red. The possible causes are as follows:
A . Node backend IP address or mask configuration error
B . Toolkit process exception
C . Multiple DHCP Server services exist in the backend network
D . Node NIC0 IP address or mask configuration error

Answer: A