Is it is possible to connect to a bladeserver it's console throug Drac CLi ?
Or maybe make some settings you can connect to in some other way.
As the Drac webinterface has died in some way and can't get working anymore on it's IP in any way I wonder if this is a possible way.
You can try using racadm commands from the host operating system. You will need to install either DRAC tools or an application like OpenManage Server Administrator that contains the toolset for RACADM.
Dell EMC, Enterprise Engineer
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