Here is what I got(may be helpful for some):
you can try this as a workaround, but I suggest just waiting it out.
To configure your Apple TV to use DHCP, from the main menu, go to Settings > General > Network > Configure TCP/IP. In the Network Setup page, select the "Manually" option.http://support.apple.com/kb/TS3623
And change the DNS to 18.104.22.168 and 22.214.171.124
Note that this is a temporary solution because it will slow down your Apple TV speed (more buffering). Once it is fixed you should change it back to 'Using DHCP"