Losing connection with xfinitywifi

I purchased an EX2700 to extend xfinitywifi into my vacation condo from an outdoor AP.  I have Comcast internet at home and use the xfinitywifi hotspots when I'm not at home with my user id / password.

Setup of the EX2700 went smoothly and I see the xfinitywifi_EXT on the list of SSID on my iPad.  I connect to the xfinitywifi_EXT, enter my user id / password on the screen and I'm connected.  After 5 minutes I realised that the wifi symbol on the iPad wasn't present.  Going to Settings / WIFI on the iPad showed the xfinitywifi_EXT with a spinning circle as though it were trying to connect and receive an IP.

Did a factory reset and did the entire setup again for xfinitywifi.  Once again it worked for 5 minutes or so.  Deleted the xfinitywifi_EXT on the iPad, turned of the iPad wifi, turned it on and selected xfinitywifi_EXT.  I watched the circle spin trying to acquire an IP for a least a minute.  I removed power from the EX2700 and waited an hour or two to try again.  Plugged it in, acquired the xfinitywifi_EXT SSID, wifi symbol appeared on the iPad and I was back on the internet for about 5 minutes.

Is or has anyone experienced this?  Is there a setting on the EX2700 or iPad that I need to change?

Thanks in advance