Regarding your X9DR7-LN4F IPMI issue, you may want to see if it has a hardware MAC address, I had a similar issue with one of the X9 boards, being that IPMI wasn't responding/working, specifically an X9DRD-7LN4F-JBOD, and it turned out that at one point when I updated the BMC/IPMI firmware it lost the mac address. There's a stackexchange post somewhere out there that shows the command with ipmitools/ipmiconfig to assign a MAC address.
Refer to this: IPMI MAC address all zeros after update
I think now that I'm looking at that thread, that I tried what the OP already did, that is, using ipmicfg, and ipmitool was the only thing that worked.
Refer to this: IPMI MAC address all zeros after update
I think now that I'm looking at that thread, that I tried what the OP already did, that is, using ipmicfg, and ipmitool was the only thing that worked.