SIOCGMIIPHY on ‘eth0’ failed: Operation not supported
Have you faced a strange error when looking for ethernet settings like its speed/duplex/etc. [root@avivr2 ~]# mii-tool eth0 SIOCGMIIPHY on 'eth0' failed: Operation not supported Try running below ethtool command, are you getting a very compact output like below without any information about modes of ethernet device. [root@avivr2 ~]# ethtool eth0 Settings for eth0: Current message level: 0x00000007 (7) Link detected: yes If yes, then it means you are checking the device status on a VM or virtual operating system maybe running on virtual esx server. You may need to load few other kernel modules to get complete information and to get rid of this error. [root@avivr2 ~]# modinfo -d e1000 Intel(R) PRO/1000 Network Driver [root@avivr2 ~]# lsmod | egrep 'pcnet32|vmxnet|e1000' pcnet32 35269 0 mii 9409 1 pcnet32 We can see no e1000 driver is loaded. Lets load this driver. [root@avivr2 ~]# modprobe e1000 [root@avivr2 ~]# lsmod | egrep 'pcnet32|vmxnet|e1000' e1000 115285 0 pcnet32 35269 0 mii 9409 1 pcnet32 Now when we run the command again, we can see the status is fine now.[root@avivr2 ~]# mii-tool eth0 eth0: negotiated 1000baseT-FD flow-control, link okIn case still you are getting the same error, it means we need to edit vmx setting(the simple way is to edit vm_name.vmx file) and add below line if not present just after ethernet0.present = “true” as shown below.
ethernet0.virtualDev = "e1000"Now when you start the machine this error will disappear.
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