How can i airplay from my mac connected through ethernet to an aple tv 2 on wifi

Hi everyone..
im having troubles using Airplay on my mac.. i connect my mac to the internet and home network using an ethernet connection to my router (non apple branded router) .. my apple tv 2  is connected to my home wifi network from the same router.. when i first set up my apple tv.. i was able to see the Airplay icon on itunes and it would let me Airplay media from my mac to my apple tv.. however.. it disconnects after a little while.. same thing with viewing my itunes library from apple tv.. i was able to detect my shared library from the apple tv.. i was able to play some media but then it disconnected after some time.. but now.. the Airplay icon doesnt show up in itunes anymore.. and i cant see my shared library from my apple tv neither.. ive looked around for a solution and followed the tip to turn the ipv6 off.. it worked for some time but now the problem is back..
i know the obvious solution is to connect my mac to the same wireless network as my apple tv.. but i would like to keep it connected through ethernet..
Mac OS X Lion 10.7.4
Apple TV 2 software version 4.4.4
Thanks in advance

thisguy. wrote:
......i know the obvious solution is to connect my mac to the same wireless network as my apple tv.. but i would like to keep it connected through ethernet.........
I wouldn't say that was the obvious answer at all, my Mac is connected by ethernet and 6 of my 7 Apple TV's are connected by wifi, I haven't had any of your problems. The problem is most likely on your network.
Intermittent problems
Intermittent problems are often a result of interference. Interference can be caused by other networks in the neighbourhood or from household electrical items.
You can download and install iStumbler (NetStumbler for windows users) to help you see which channels are used by neighbouring networks so that you can avoid them, but iStumbler will not see household items.
Refer to your router manual for instructions on changing your wifi channel or adjusting your multicast rate.
There are other types of problems that can affect networks, but this is by far the most common, hence worth mentioning first. Networks that have inherent issues can be seen to work differently with different versions of the same software. You might also try moving the Apple TV away from other electrical equipment.
Consistent Problems
A frequent cause of consistent failure to enable AirPlay or HomeSharing at all, is the service being blocked on the network. Make sure your network isn't hidden, has a unique name, that MAC address authentication is disabled, security is set to use WPA 2 Personal and that there is only one router/device acting as a DHCP server and providing NAT services.
Make sure your router/computer allows access over the following ports
Port
Type
Protocol
Used By
80
TCP
HTTP
AirPlay
443
TCP
HTTPS
AirPlay
554
TCP/UDP
RTSP
AirPlay
3689
TCP
DAAP
iTunes/AirPlay
5297
TCP
Bonjour
5289
TCP/UDP
Bonjour
5353
TCP/UDP
MDNS
Bonjour/AirPlay
49159
UDP
MDNS (Win)
Bonjour/AirPlay
49163
UDP
MDNS (Win)
Bonjour/AirPlay
Refer to your router manual/manufacturer for any settings that are specific to that model.
Another frequent cause of consistent failure to enable AirPlay or HomeSharing at all, is security software, in many cases configuring it correctly, disabling it or even uninstalling it can help, but in some cases the security software can cause problems that simply reconfiguring, disabling or uninstalling cannot reverse.
If you are consistently unable to activate AirPlay, have tried all the steps in this article and have security software installed on your system, you might benefit from contacting its provider or participating in any online forums they run to discuss the matter with them.

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