usb0 ip not assigned

[Stinocon]

I am trying to connect to the local usb0 interface so that I can check bjorn and possibly change WiFi networks to scan.
Unfortunately, however, I can only ever reach it through the IP of the WiFi network I initially connected it to.

I use a Mac and if I connect bjorn via USB I see it properly listed in the network interfaces. Clearly I set my interface as listed on 172.20.2.2 etc etc.
Via SSH by running an ip addr I see that the usb0 interface (which should have 172.20.2.1) has an apipa address.

The configuration in /etc/network/interfaces seems correct

allow-hotplug usb0
iface usb0 inet static
address 172.20.2.1
netmask 255.255.255.0

Suggestions? Thanks

2: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
inet 169.254.98.1/16 brd 169.254.255.255 scope global noprefixroute usb0
valid_lft forever preferred_lft forever
inet6 fe80::1caa:21ed:27f4:9bce/64 scope link
valid_lft forever preferred_lft forever

[timewall]

Look in the file /etc/networks, your IP is there

The two settings seem to be interfering with each other.

At least Björn can be reached at IP 169.254.98.1. I haven't found a quick solution.

[Stinocon]

Okay... I was able to create a workaround.
I took /etc/networks and changed the link-local subnet to reflect what it should be:

172.20.2.0

Then I edited /etc/dhcpcd.conf by adding at the end of the file

interface usb0
static ip_address=172.20.2.1/24

After rebooting, the device responds correctly on address 172.20.2.1