iPads suddenly cannot detect Apple TV's for Airplay on entire network

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  • Updated 2 years ago
Suddenly this morning no iPads can detect any Apple TV's.

I've got a single VLAN with Apple TV's and iPads using it.  Until now iPads have consistently been able to detect Apple TV and successfully connect for Airplay.

Apple TV's show up among active clients with health score of 100%.  Network test back to Apple is positive.

I've rebooted Apple TV's, "forgotten" and rejoined the network, restarted iPads, no avail.

If anyone can think of a reason why all ability to detect AppleTV would suddenly cease I'd be grateful to hear from you.

I had recently applied a firewall policy to the Student user profile blocking some file sharing apps but I've removed the policy just in case it was the culprit (though the Apple TV problem affects the faculty user profile as well).

Any help will be greatly appreciated.

Thanks,

Steve
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Steve Kellogg

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  • At a loss

Posted 2 years ago

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Brian Powers, Champ

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Any chance you can elaborate a bit more about your current setup?  AppleTVs on one SSID (VLAN)?  Students on an SSID (VLAN)?  Faculty SSID (VLAN)? 

What generation is the iOS gear?  AppleTV model?

Are you utilizing the Bonjour Gateway service if you have the gear on different VLANs?

If so, I'd start at looking at your BDD device on your WLAN and see what it is showing in the way of learned mDNS info.
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Steve Kellogg

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Hi, Brian,

Thanks very much for your reply.  It turned out to be a simple and rather stupid move on my part as you can see from my reply below.  I've got a lot of traffic that I can cut down considerably but disabling inter-station traffic but I also (obviously) kill communication with the Apple TV's.

As to my setup, It's all one VLAN for Apple TV and iPads (both student and faculty).   I should probably change that but will wait until school is out next month.

The iPads are all iPad Air 1.  The Apple TV's are 3.2.

If you have suggestions as to cut down on unnecessary inter-station traffic but keep Apple TV available i'd be very grateful.

Thanks again,

Steve
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Brian Powers, Champ

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The inter-station traffic is tied to an SSID, yes?  I wonder what the result would be if the iPads and AppleTVs were on different SSIDs/VLAN.  With inter-station traffic disabled on the SSID that the iPads are on.  
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Steve Kellogg

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That's an interesting idea.  I'll give it a try on a test device.  The simplicity of the single VLAN was not having to deal with inter-VLAN routing for Apple TV but I think it would be worth it to cut down on unnecessary airtime usage.  My network (apart from Apple TV connectivity) looked really happy with inter-station traffic disabled.

I'll give this a try when I get a chance and will get back with the results.

Thanks!

Steve
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Steve Kellogg

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Brian,

Your idea is working perfectly.  I've got the AP switch ports tagged for both the iPad and the Apple TV VLAN's.  The SSID assigned to the iPad VLAN has inter-station traffic disabled.  All of my high collision state notices have gone away and teachers can pair with Apple TVs from the iPad SSID.

So far, this appears to be a great solution because there had previously been a lot of chatter using up airtime on the iPad SSID.

Thanks for the suggestion!

Steve
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Steve Kellogg

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I found it - as usual it was all of my own doing.  I had unchecked "enable inter-station traffic" in the traffic filter policy I was using.  That was a rather foolish thing to do.

I'd love to be able to disable inter-station traffic among iPads and laptops but allow them all to detect and connect to Apple TVs.