Yes, I have multiple routers, The first is a Motorola NVG510 at&t dsl modem and router. Normally the wireless functions are turned off
That router connects to a Linksys WRT 1900AC. Which is used for Ethernet and WIFI. The iPad is generally connected to the 5ghz signal and the 2.4ghz radio is disabled.
During the trouble shooting of Itunes, I moved the iPad from 5ghz to 2.4ghz and that made no difference. Everything except iTunes worked. I then turned on the 2.4ghz radio on the normally unused WIFI part of the Motorola modem/router, and again everything work other then iTunes.
When iTunes can find the iPad any attempt to sync will result in "Can not find iPad" error and the sync is canceled and the iPad icon goes away. Maybe 1 out of 10 times when I start iTunes the iPad will show up, if it does it will error out when I try to sync via WIFI
Both Routers are on the same network but only the linksys has WIFI turned on. The iPad works flawlessly, except iTunes and always has a full signal from the 5ghz router.
I do use mac address filtering just to make it that much harder for the wannabe geek next door from getting into my system.
I don't understand how the routers are configured other then what I indicated. Other then there has been no changes since the time when iTunes and the iPad worked.
I have reinstalled iTunes with no help. I have powered down the iPad and that did not help. I have powered down the desktop and all the modems/Routers and that did not work. I switched to another bootable partition that is months old and that did not work. I booted into Yosemite from Mavericks and that did not work.
Thanks,
Rachael Jellicoe