#To add new rule for new device you have to run (in case if you want to add eth1 interface)
#admin@mtcdt:~# udevadm info --attribute-walk --path=/sys/class/net/eth1
# looking at device '/devices/ahb.0/700000.ehci/usb1/1-2/1-2.1/1-2.1.1/1-2.1.1:1.0/net/eth1':
#    KERNEL=="eth1"
#    SUBSYSTEM=="net"
#    DRIVER==""
#    ATTR{mtu}=="1500"
#    ATTR{type}=="1"
#    ...........
#    ...........

#  looking at parent device '/devices/ahb.0/700000.ehci/usb1/1-2/1-2.1/1-2.1.1/1-2.1.1:1.0':
#    KERNELS=="1-2.1.1:1.0"  <------------------- extract this record to add to the rule
#    SUBSYSTEMS=="usb"
#    DRIVERS=="smsc75xx"
#    ATTRS{bInterfaceClass}=="ff"
#    ATTRS{bInterfaceSubClass}=="00"
#    ...........

# Four port to four port hub case
KERNELS=="1-2.1.1:1.0", SUBSYSTEMS=="usb", DRIVERS=="smsc75xx", NAME="eth1"
KERNELS=="1-2.1.2:1.0", SUBSYSTEMS=="usb", DRIVERS=="smsc75xx", NAME="eth2"
# Four port to two port hub case
KERNELS=="1-2.2:1.0", SUBSYSTEMS=="usb", DRIVERS=="smsc75xx", NAME="eth1"
KERNELS=="1-2.3:1.0", SUBSYSTEMS=="usb", DRIVERS=="smsc75xx", NAME="eth2"