changing IP address of USB port

The BBB acquires IP address on the USB port.
This does not give it access to my router and the internet at
I’d like to assign a different IP address to the USB port.
But when I change the file etc/network/interfaces the change is not honored and it comes up anyway.

Did you setup your host pc to act as a bridge between the
network and your usb

Usually, in a all linux setup:

sudo sh -c "echo nameserver > /etc/resolv.conf"

is enough on your bbb,

for a windows environment, enable internet connection sharing..