I seem to also be plagued with apple tv connection issues. When I connect to my wifi I can do everything but connect to my home sharing. I have tried everything I can think with router settings rebooting router modem and restoring atv to no avail.
I've spent countless hours working on this problem the consensus seems to be the atv update messing with Internet and home sharing functions. I have everything working but the home sharing function and I am stuck trying to fix it. One probable solution seems to be downgrading atv software but alas no micro USB cable just wondering if there was any other solutions since I am connected to everything else to be able to connect to my home sharing features. No firewall issues that I can see and the ip addresses are all correct hence other features working ie YouTube, trailers etc
AppleTV 2