I have a small problem whith my appletv. When i hook it up to my 951G-2HnD on Ethernetcable I just dont seem to get it to work properly. It´s slow and has horrible videoquality but connected to wifi it works just fine streaming Netflix and rentals all in perfect HD quality.
I tried different cables whith no success. Tried whith my old Linksysrouter and it worked perfekt as well.
Thankful for any new lead i could get! 
I have exactly the same issue, AppleTV works fine on WiFi and very slow on eth.
Did you find any resolution?
I have exactly the same issue. AppleTV works fine on WiFi and very slow on eth.
Did you find any resolution?
Right now at our client home, I can confirm identical syndrome - no matter how we try, AppleTV box does not work over ethernet, but does just fine via wi-fi.
Had anyone find out, what could be the cause? TV works, PC works, but AppleTV does not work. Etherned port are put into switch mode …
I don’t know if this can be helpful but I have no problem with Apple TV (ATV3). Though this is with a RB2011UiAS-2HnD and I’m using bridge mode.
We have tried independent Ethernet, ethernet being put into switch, bridge. As far as AppleTV is connected to the ethernet port, it does not work, well, maybe it works, but at mediocre speeds. Our RB is RB951G-2HnD, latest 6.18 firmware …
I have the same model, my first MikroTik and it’s blown me away except for this seriously annoying problem.
Set multicast-helper to full on the wireless interface and you should be good to go.
/interface wireless> set 0 multicast-helper=full
Related thread here.
I have same trouble too.
ATV3 connected directly to ethernet port 951G-2HnD, and when I try to play something from iTunes using Internet connection, or from my PC via iTunes Home Sharing, ATV begin buffering infinitely.
But if i connect ATV to 951G-2HnD via wifi, everything works fine.
Have changed a lot of length and type of patch-cords.
Anyone have solution?
I found temporary workaround!
I have connected ATV to my Mikrotik via dumb unmanaged 5-port Gigabit switch (TP-Link).
Problem has disappeared. Any ideas why?
Did you try setting the multicast-helper option as I posted directly above your reply?
Not sure what problems folks are having. I have the RB450G that connects two Apple TV’s…Apple TV1 and Apple TV3 via a gigabit switch and cat7 Ethernet cables for two years…streaming Netflix, never a problem.
The issue is (was) specifically with excessive buffering when attempting to AirPlay YouTube to an AppleTV; after starting the connection it would take up to a minute for the video to start playing.
It was happening to me on both ATV3 and ATV2 before setting multicast-helper to full on the wireless interface of the RB951Ui-2HnD.
Yes, multicast-helper=full.
But i am using Ethernet connection between PC and ATV3.
Yes, and the YouTube AirPlay (multicast) traffic from your iOS device lands on the wlan interface of the MikroTik before getting shuttled over the bridge internally and spit out the LAN.
The issue is multicast propagation between wireless and wired, even when they’re on the same bridge.
I was going to lab it up and to packet capture but since the multicast-helper option resolved the issue for me I didn’t bother.
Quoting myself since it looks like you’re dealing with a different issue if you’re pushing content from iTunes on a PC to the AppleTV, you’re having issues with audio, or?
I have issue with playing video (1080p)
I don’t have this setup, but since someone further up the chain mentioned that adding a hub/switch between the apple TV and the Mikrotik helped… have you looked at the link between the apple TV and the Tik? What is the port auto negotiated at? Is it flapping? Maybe try setting that port to 100Mbps / Full Duplex rather than letting it auto negotiate.
Screen Shot 2015-05-19 at 10.59.41 AM.png
Sorry for late answer, was busy.
Right now I have tried to set port speed to 100Mbps FDX - no result, movie still buffering infinitely.
I don’t have any ideas how to make it works without additional switch between Tik and ATV.
If understand correctly, you’re trying to stream via airplay from an IOS device to your AppleTV…namely YouTube content…is there any reason you can’t get the YouTube content directly from your AppleTV?
No, I am trying to stream m4v file via iTunes HomeSharing using Gigabit LAN. And it freezing.
If I playing file using Wi-Fi - it works fine.