07-11-2018 04:35 AM
WiFi calling for Verizon isn't working when connected to my IAP 225 running 126.96.36.199; however, it will work when connected to a Desktop hotspot connected to the same network. I've taken a few packet caps, 1 at the router showing the failure, and 1 using the desktop hotspot showing a successful connection to wifi calling.
Solved! Go to Solution.
07-11-2018 07:43 AM
It looks like possibly an MTU related issue.
From the desktop AP, the SA_INIT starts, there's an initial Initiator Request that is responded to, so a retry with smaller payload. The setup continues with the smaller frame size.
On the AP225, the SA_INIT starts with a response back from Verizon, the client attempts to start with the larger frame size, but never retries with a smaller payload.
Aruba Customer Engineering