Angstrom 3.8.13 usb0 failure

The original BBB had an image that allowed using the usb0 via 168.192.7.2
After upgrading to 3.8.13 I cannot use usb0 anymore.
My eth0 mask is 255.255.255.0
but
the usb0 mask is 255.255.255.252
in ifconfig.
That looks suspicious as the .252 mask would be a different subnet.
Problem is, I cannot figure out how to correct that.