Suddenly, the eno1 NIC seems to have disappeared. It's still being identified but it's missing the e1000e driver somehow, or perhaps it's not using the driver properly.
Here are some of the commands I've run to attempt to troubleshoot:
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[root@home network-scripts]# nmcli d
DEVICE TYPE STATE CONNECTION
enp4s0 ethernet connected enp4s0
lo loopback unmanaged --
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[root@home ~]# ls /etc/sysconfig/network-scripts/ifcfg*
/etc/sysconfig/network-scripts/ifcfg-eno1 /etc/sysconfig/network-scripts/ifcfg-enp4s0 /etc/sysconfig/network-scripts/ifcfg-lo
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[root@home ~]# ifup eno1
Error: Connection activation failed: No suitable device found for this connection (device enp4s0 not available because profile is not compatible with device (mismatching interface name)).
[root@home ~]# ifconfig eno1 up
eno1: ERROR while getting interface flags: No such device
I see an unclaimed Ethernet controller when I run `lshw -class network`:
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*-network UNCLAIMED
description: Ethernet controller
product: Ethernet Connection (7) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
version: 10
width: 32 bits
clock: 33MHz
capabilities: pm msi cap_list
configuration: latency=0
resources: memory:a1300000-a131ffff
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00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-LM (rev 10)
Subsystem: ASRock Incorporation Device 15bb
Kernel modules: e1000e
04:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)
Subsystem: ASRock Incorporation Device 1533
Kernel driver in use: igb
Kernel modules: igb
Which indicates to me that the driver is not being loaded or used for this connection.
There is also a clear error message from `dmesg`:
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[ 7321.758557] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 7321.758560] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 7321.758762] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[ 7321.758785] e1000e 0000:00:1f.6: irq 500 for MSI/MSI-X
[ 7322.764417] e1000e: probe of 0000:00:1f.6 failed with error -2
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[root@home ~]# lsmod | grep e1000e
e1000e 248519 0
ptp 19231 2 igb,e1000e
Is there something in the BIOS settings? (I hope not as I am managing this device remotely)...
Or any other troubleshooting steps? I've downloading `elrepo1` and attempted to attach `kmod-e1000e` to no avail - or possibly, I'm not doing it properly... Any help would be greatly appreciated as I've gotten to my wits' end with this one.