~ # ethtool -i vmnic2

Can not get control fd: No such file or directory

~ # esxcli network nic get --nic-name vmnic2

There is no pnic with name vmnic2

~ # grep -i vmnic /etc/vmware/esx.conf

/vmkdevmgr/pci/p0000:0f:04.0/alias = "vmnic0"

/vmkdevmgr/pci/s00000004.01/alias = "vmnic3" #is there syntax mistake?

/vmkdevmgr/pci/s00000004.00/alias = "vmnic2"

/vmkdevmgr/pci/p0000:0f:04.1/alias = "vmnic1"

/device/000:015:04.1/vmkname = "vmnic1"

/device/000:015:04.0/vmkname = "vmnic0"

/device/000:009:00.1/vmkname = "vmnic3"

/device/000:009:00.0/vmkname = "vmnic2"

/net/vswitch/child[0000]/uplinks/child[0000]/pnic = "vmnic0"

/net/vswitch/child[0000]/teamPolicy/uplinks[0000]/pnic = "vmnic0"

/net/vswitch/child[0000]/portgroup/child[0000]/teamPolicy/uplinks[0000]/pnic = "vmnic0"

/net/vswitch/child[0001]/uplinks/child[0000]/pnic = "vmnic1"

/net/vswitch/child[0001]/teamPolicy/uplinks[0000]/pnic = "vmnic1"

/net/vmkernelnic/child[0000]/macFromPnic = "vmnic0"

/net/pnic/child[0000]/name = "vmnic0"

/net/pnic/child[0001]/name = "vmnic1"

~ # esxcli system module get --module igb

   Module: igb

   Module File: /usr/lib/vmware/vmkmod/igb

   License: GPL

   Version: Version 5.3.1, Build: 1331820, Interface: 9.2 Built on: Sep 10 2015

   Signed Status: Unsigned

   Signature Issuer:

   Signature Digest: 84fc 15df aa35 7aa5 1294 9606 3130 1cb4 89bd 8064 86f1 78af 1a2d 215d 2813 c91c

   Signature FingerPrint: 0000 0000 0000 0000 0000 0000 0000 0000

   Provided Namespaces:

   Required Namespaces: com.vmware.driverAPI@9.2.2.0, com.vmware.vmkapi@v2_2_0_0

~ # esxcfg-module --get-options igb

igb enabled = 1 options = ''

~ # enum_instances VMware_EthernetPort root/cimv2

error: enumInstances Failed initialization

I'll try to update to 5.5u3 today.