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Helpful answers
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May 23, 2016 3:37 PM in response to paulfromroleystoneby jph1589,Here we are over a year since this thread started and I have been struggling with this issue for 6 months. I have 10mb down and 1mb up and a combination of windows and mac and ps4 and xbox running happily.....UNTIL .... you plug in an iphone or ipad and they start to backup to icloud. If I turn off the photo backup in the backup settings it doesnt happen. When the photo backup is turned on It takes less than 2 minutes to completely lock up the entire internet connection. I have had this happen on multiple versions of IOS and Mac software and on a variety of different ipads.
I started by getting the cable modem replaced with a new model and that made no difference. Next I tried 2 different routers. Each one more expensive than the last. One was a netgear dual band and now I have the latest ASUS AC1750. All with the same results. When the apple devices back up to the cloud with photo backup turned on they bring the cable modem to its knees. The new router even shows me in the diagnostics that the cable modem is effectively down when this happens. I have to reboot the router to get any other traffic flowing. Once the backup starts back up it crashes again. The only way to survive this is for nobody else on the network to do anything while an apple device is backing up.
I have talked to the ISP and the modem mfg and the router mfg and they all say this is a known issue with backups to icloud. I am really surprised that Apple doesn't fix this problem. I buy too many devices from them to feel like I should get used to them ignoring things like this.
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May 23, 2016 4:20 PM in response to jph1589by LACAllen,Do you have the Photos library set to optimize photos? This can create a great deal of extra traffic on an ongoing basis. Especially if the libraries are large. iCloud and Photos communicate back and forth about available space and make adjustments in real time. So, if you have 1000 optimized photo thumbnails on a phone when you start, and are adding 200 photos, the process re-evaluates the thumbnails for all 1200 photos and may have to send them to the phone.
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May 23, 2016 4:43 PM in response to LACAllenby jph1589,I am not using the icloud photo library. It is turned off. This is just from the backup of photos from the iphone or ipad to the cloud when the unit is charging.
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May 23, 2016 4:47 PM in response to jph1589by LACAllen,Oh.. are you starting an iCloud backup when you connect these devices, or is it just the iCloud sync happening? Without photos, the amount of traffic should be minimal.
If you just want to charge the device, maybe toggle Airplane Mode while attached.
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May 23, 2016 5:10 PM in response to LACAllenby jph1589,I understand completely all the ways to avoid the problem. But my point is that the problem should not exist and I shouldn't have to avoid it. I should be able to plug in an iphone or ipad to charge and have them backup photos or apps or anything else I want to back up. I shouldn't have to turn off the photo backup to keep the problem from happening. I also shouldn't expect all other traffic on my network to come to a stop, but it does. We aren't talking about thousands or even hundreds of pictures. Once I got past the initial backup it only backs up new pictures or videos. That might amount to tens or twenties and should not be causing this issue, but it does.
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May 23, 2016 5:26 PM in response to jph1589by LACAllen,But, the problem does exist.
I offered a coping mechanism. Pardon me then. Rant on my friend.
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May 23, 2016 5:39 PM in response to LACAllenby jph1589,I am sorry. Turn off my photo backups should be an acceptable solution? Or put it in airplane mode so that it never backs up? Why should I find that as an acceptable alternative? Why isn't fixing the problem an option??
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May 24, 2016 9:53 PM in response to Señor Josuéby Eric Barbosa,Curious if others who have this issue also have AirPort N device(s) (Express, Extreme or Time Capsule) and if the update released yesterday has fixed it. I am currently backing up 2 devices to iCloud and just synced a short 4K video from my iPhone at the same time and my stream from Hulu is playing smoothly.
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May 28, 2016 1:36 PM in response to Señor Josuéby jph1589,FYI ....... I just installed IOS 9.3.2 in hopes that this might be fixed. 10 minutes after starting the icloud back up on phone the network crawled to a slow burn. Another 5 minutes later the network stopped functioning and the router diagnostics said the modem was not responding. As soon as I canceled the backup the network came back to life.
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Jun 20, 2016 8:21 AM in response to Señor Josuéby omakad,I had a same problem. After long search I have found this from user matt engops on a different forum and this will definitely fix this issue for you. I'm pasting the answer that helped me.
"What you are seeing is due to how one of the fundamental protocols that make up communication on the internet works. Typical web traffic is transferred using a protocol known as TCP, which is a method of transferring data back and forth where the connection verifies that you have received everything. It would be pretty weird if you were trying to load an image or a webpage and parts of it were just missing, right? TCP sends something called "acknowledgements" or ACKs to let the each side know as parts of the data transfer complete, so that if packets arrive late or get lost along the way, TCP can put them back in order or re-send anything that was lost.
But...
If you pin your upload 100% with iCloud or Twitch uploading or whatever, you can't send these ACKs and your download will slow to a crawl as TCP will slow itself down thinking you have a connection issue. This is why if you have a program that does a lot of uploading, if it has the ability to set download/upload limits you should set your upload rate to 75-80% of your upload speed."
In other words you have to limit your upload speed on your router if your using TCP. I limited all my iCloud devices and this fixed the problem.