Hi all, 

I am having a very weird issue on a public network and I am not finding any answers to that. 

A person using that wifi is having issues with all of his IOS devices able to connect to the network but cannot browse internet. I changed the wifi SSID for that user on that particular access point which was close to his location and he is able to connect and browse. Why he is not able to browse the internet with the common WiFi ssid which is avalable for others. Other users can connect and browse internet fine with that SSID but not that particular user. Its on all IOS devices only. Also when I was troubleshooting this issue I found that he is getting a weird IP address like 172... but my gateway does not provide this DHCP my gatway provide 192 series IP address. have someone seen this issue and is there a fix for it. Right now user is connected with a seperate SSID not the one shared by others. Please help