cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

AppleTV 4K Ethernet Madness

Building a reputation

AppleTV 4K Ethernet Madness

I have a few Apple TV 4K on the network. Wireless not a hassle. Wired well they are problem children.

 

The wired clients, every few seconds, give me Port STP changes/Port status changes as in designated→disabled/old: 1Gfdx, new: down/ old: down, new: 1Gfdx

 

And these are sleeping devices.

 

Which also give a high proportion of CRC align errors, only on received. When the Apple TV 4K's are actively streaming, Airplaying the CRC errors disappear. 

 

So the theory is on a wired client in order for the AppleTV to act as a HomeKit hub Apple has designed a special WOL packet that messes with Meraki Switches. And the reason the wireless clients are a bother is a) no WOL for you and b) I think Apple uses the sign into iCloud to provide that functionality.

 

Of course I could be way off here but has any one else seen the flapping Apple TV 4K?

 

I reached out to Meraki support but nothing more that, new cable, new port and new switch, all of which have not resolved.

 

34 REPLIES 34
Building a reputation

Re: AppleTV 4K Ethernet Madness

I’ve had a ticket open regarding this(high CRCs while sleeping) for several weeks.  Support has no clue. 

Building a reputation

Re: AppleTV 4K Ethernet Madness

I've looked about on the internets, and see others with same issue. I filed a feature request with Apple as well. as per suggestions on Apple Forums. It would be nice if there was some info either from Apple or a proffered solution from switch vendors.
Kind of a big deal

Re: AppleTV 4K Ethernet Madness

As a short term solution could you just set the devices not to sleep?

Meraki CMNO, Ruckus WISE, Sonicwall CSSA, Allied Telesis CASE & CAI
A model citizen

Re: AppleTV 4K Ethernet Madness

I've seen this mentioned a lot on macOS forums. It causes issues with other vendors gear as well.

Very annoying, we've seen it first hand at our clients sites
Comes here often

Re: AppleTV 4K Ethernet Madness

That's too bad. My setup works 100%.

 

I have an Apple TV 4K 64GB plugged into my MS220-8P. It works flawlessly.

 

I've had the Apple TV for a year or more. I've had the MS220-8P for 3+ years. For the Apple TV there are zero events on the MS120-8P log.

 

My MS120-8P is running MS 10.45 firmware. 

 

Is there anything notably different about your setup? 

Kind of a big deal

Re: AppleTV 4K Ethernet Madness

I'm going to take a wild stab and guess it is using something like Energy Efficient Ethernet and is downshifting its speed when idle to save power, causing a link transition.

Building a reputation

Re: AppleTV 4K Ethernet Madness

I see that on the iMacs, but this is constant when the device is sleeping.
Highlighted
Building a reputation

Re: AppleTV 4K Ethernet Madness

MS120-8P or MS220-8P?
Comes here often

Re: AppleTV 4K Ethernet Madness

MS220-8P 

Building a reputation

Re: AppleTV 4K Ethernet Madness

Any diff between MS210 and MS220?
Building a reputation

Re: AppleTV 4K Ethernet Madness

I'm on a MS 10.45, MS220-24P.  Appears to be something in the code, I have some MS220-8P on MS 8.10 and see no issues. 

Kind of a big deal

Re: AppleTV 4K Ethernet Madness


@Richard_W wrote:
Any diff between MS210 and MS220?

If the question was really that... the MS220 (non-compact) is EOL and didn't support stacking. MS210 is a current model and supports stacking. MS220 has the compact model mentioned in this topic, the MS210 doesn't, see below.

 

Datasheets here:

https://meraki.cisco.com/lib/pdf/meraki_datasheet_ms210.pdf

https://meraki.cisco.com/lib/pdf/meraki_datasheet_ms_220_320_only.pdf

 

However I assume your question was really whether there is a difference between MS120-8FP and MS220-8P. Then the answer is that the MS120-8FP is much more compact and that there's a lower PoE budget version of it called MS120-8LP. The MS220-8P is EOL.

Datasheets:

https://meraki.cisco.com/lib/pdf/meraki_datasheet_ms120_compact.pdf

https://meraki.cisco.com/lib/pdf/meraki_datasheet_ms220_compact.pdf

Building a reputation

Re: AppleTV 4K Ethernet Madness

@Welles So you have the issue with MS 10.45 on MS220-24P but not with MS 8.10 on MS220-8P, if I'm understanding correctly?

 

Building a reputation

Re: AppleTV 4K Ethernet Madness

@Richard_W Correct. 

Building a reputation

Re: AppleTV 4K Ethernet Madness

Apparently Meraki support had sent updates to the case I did have open regarding this issue. Of course the four updates, I never received any notification and they closed the case.  So I reopened it and we'll see where this goes. It sounds like they know about this bug and it's being ignored. I have sent pcaps, as they requested, and I've asked for an update, but silence from Meraki support. Which, frankly, is pretty normal when something like this occurs. I have asked to have it escalated, but, I'm sure nothing will happen. 

A model citizen

Re: AppleTV 4K Ethernet Madness

Now I know this sounds a bit full of it.

But i've always found Meraki support to be really helpful, even with random bugs. They've needed a prod every now and then but who doesn't right?

Have you found them that bad?
Building a reputation

Re: AppleTV 4K Ethernet Madness

Different networks have different issues. I average 17 cases a year, 119+ tickets opened.  

A model citizen

Re: AppleTV 4K Ethernet Madness

Very true, we've seen our fair few as well. Issues with systems not working as per the documentation etc. But support have always been helpful and rewritten the documentation or changed features etc

Just surprised if your overall impression of them was negative thats all
Building a reputation

Re: AppleTV 4K Ethernet Madness

just to give a visual to it, note that the green connectivity is due to the device in use:

 

Screen Shot 2019-03-28 at 2.57.45 PM.png

Building a reputation

Re: AppleTV 4K Ethernet Madness

And mine looks like this: 

 

57F4DAEC-FD1A-4111-9A6B-598F102C4401.jpeg

Building a reputation

Re: AppleTV 4K Ethernet Madness

May have figured the issue.

 

My Apple TV 4K was on VLAN 1, once moved to a new VLAN, issues appear to have resolved.

Building a reputation

Re: AppleTV 4K Ethernet Madness

Spoke too soon. Issue is back, still had port flapping issues regardless.
Bangs-head-on-desk kinda Monday…
Conversationalist

Re: AppleTV 4K Ethernet Madness

I'm experiencing the same issues (port constantly bouncing and high CRCs when sleeping), however I am using a Catalyst 2960S switch.

Interestingly, I bought two Apple TV 4K (32GB) units at the same time, both are running 11.3 and connected to the same switch with exactly the same switch port configuration. One experiences the issue and the other doesn't. I've tried swapping cables, switch ports etc. to no avail. Both are connected to the same iCould account and have the same sleep settings.

The only discernible difference between the two is the TV on which they're connected: Sony Bravia (no issues) vs Samsung.

I will try swapping the Apple TVs between TVs and see if the problem moves or persists.

I also have another customer who's experiencing the same issues connecting on Ubiquiti EdgeSwitches, so I would be surprised if Meraki are able to resolve this issue.

Conversationalist

Re: AppleTV 4K Ethernet Madness

I swapped the Apple TV 4K units between TVs, leaving the power, HDMI and network cables in their original place, and the issue moved with the Apple TV 4K.

So this tells me the issue is isolated to the Apple TV, and nothing to do with the cabling, network config or TV.

Other threads suggested that the issue may be to do with HDMI "chatter", but with the problem moving to the new location on a previously OK TV (different model, HDMI specs and cable), tells me it is not related to HDMI.

Conversationalist

Re: AppleTV 4K Ethernet Madness

Can confirm that I have the same issue on my MS120-48LP running MS 10.45.

I have 7 AppleTV 4k connected and all of the switchports reports very high amount of CRC-errors as soon as the AppleTV is not in use.

Conversationalist

Re: AppleTV 4K Ethernet Madness

I got an answer from Meraki Support:

"We have re-created this issue in a lab environment, It appears that the Apple TV NIC tries to negotiate a half-duplex switch mode in sleep mode.

I can confirm that Cisco Meraki is currently speaking to Apple regarding this issue."

 

So hopefully Apple will update the firmware or Meraki figure out a workaround for this issue soon.

Building a reputation

Re: AppleTV 4K Ethernet Madness

And how are we getting along with a solution for this?

 

Apple?

 

Meraki?

 

Crickets?

Meraki Employee

Re: AppleTV 4K Ethernet Madness

Honest question: should this issue be in the Endpoint Management community forum? And yes, I'm trying to 'pass the buck' if indeed my switching brethren are the rightful owners of said currency. 

Kind of a big deal

Re: AppleTV 4K Ethernet Madness

Yup, this hot potato is destined to be in the hands of the switching team.

Community Manager

Re: AppleTV 4K Ethernet Madness


@Noah_Salzman wrote:

Honest question: should this issue be in the Endpoint Management community forum? And yes, I'm trying to 'pass the buck' if indeed my switching brethren are the rightful owners of said currency. 


Passing the buck on your behalf, @Noah_Salzman! Moving this thread to the switching forum.

Caroline S | Community Manager, Cisco Meraki | @merakicaroline
New to the community? Get started here
Building a reputation

Re: AppleTV 4K Ethernet Madness

At this point where it is, matters less to a potential resolution (I really have no idea why I put it in Endpoint 🤔.) 

 

So as long as a solution is forthcoming it can go wherever it may.

Conversationalist

Re: AppleTV 4K Ethernet Madness

Sadly I believe the ball is in Apple's court on this one.

 

I've seen this issue on 4 different vendors switches, but not all AppleTV 4Ks display the problem.

 

However, I updated to the new tvOS 13.0 this morning, and since then my 4K switch port has been stable. Fingers crossed this resolves the issue!

Building a reputation

Re: AppleTV 4K Ethernet Madness

@snowbie that sounds promising, I'm holding off a little on tvOS 13.0 just so I can get through other upgrades first, but thanks again for the update!

Conversationalist

Re: AppleTV 4K Ethernet Madness

Just to further update, the two Apple TV 4Ks I updated to tvOS 13.0 three days ago have remained stable. No interfaces bouncing, no half-duplex, and no FCS or CRC errors.

 

For me, the issues were present from tvOS 11 to 12.4.1.

Welcome to the Meraki Community!
To start contributing, simply sign in with your Cisco account. If you don't yet have a Cisco account, you can sign up.