Sudden connectivity loss to a device
Lenovo XClarity Management Hub 2.0 checks the connectivity status for each device every hour. If the management hub cannot connect to a device, the connectivity status for that device changes to Offline.
Connectivity issues are typically related to a network problem.
Check the event log for any network events, and resolve the issues, if any.
Ensure that the network hardware is functioning correctly for the connection path to the device.
Ensure that the correct switch and firewall ports are enabled for the device. For information about required ports, see Configuring the management hub network
Ensure that the device has a valid network configuration by logging in directly to the device and verifying that the IP address is valid for the network. You can also ping the device to test if it is visible on the network.
Attempt to re-manage the device using the current management hub or another management hub.