IOS devices not able to complete DNS handshake
12-20-2019 07:52 AM
Just wanted to share this with the group. We recently had a very strange thing happen out of the blue. IOS devices on our guest network were not able to browse and most applications on the devices would not function either. It was limited to just these devices, Andriod, Windows, MacBooks etc all worked fine.
We found that it was being caused by jumbo frames being enabled on the VLAn the access points were in. Now this had been enabled for months with no issues. Big mystery as to why it suddenly went bonkers.
Anyway just sharing this info.