IP Confict issue to be aware of when using USB teathering
When the iPhone (and probally any USB modem or WAN) issues the same subnet as already used elsewhere on the routers networks (including VLANs), the USB connection will fail with errors like “WAN failed SmartCheck”.
In our discovery today, the customer was using 172.20.10.x as the Untagged LAN, the iPhone issued its hotspot network on 172.20.10.x, so we changed the customers network to make the solution work.
Something to be aware of if you find your USB teathering is not working.
Happy teathering,
Marcus ![]()

