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Unifi Unifi Netflix at night, Slow buffering at night

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zainframe
post Apr 3 2018, 09:41 PM

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QUOTE(GOPI56 @ Mar 28 2018, 10:00 AM)
Try changing the Netflix playback setting to high. This might solve the problem.
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Unfortunately no sad.gif. This was the first thing Netflix tech support told me to do.
XPS
post Apr 5 2018, 12:22 AM

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QUOTE(zainframe @ Apr 3 2018, 09:39 PM)
I too have been suffering from this bullshit for the past few weeks. This does look like Netflix is being throttled at certain time of day. Around 8-12pm everynight I will get no more than 1080p, sometimes down to 720/480p. My router indicates that the TV is CONSTANTLY using 5Mbps download speed- It looks like its being hard capped at that speed.
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Can confirm that nights the video quality drops as you had reported.

This post has been edited by XPS: Apr 19 2018, 08:59 PM
kaiserreich
post Apr 5 2018, 02:05 PM

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I noticed Unifi Mobile also have this dependency.
Probably running on same backbone.
KKTECHHUB
post Apr 6 2018, 01:56 AM

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try to get a vpn and test it out, sometime our ISP is detect certain traffic pattern and slow down the speed during certain period.

One main different for me is that when i stream video on facebook, it buffer a lot sometime. After turn on vpn, the speed go back to normal.

I believe they turn on qos on certain traffic pattern or depends on certain destination IP that often slow down the network. If based on destination IP, the only way to get around it is vpn.

not 100% confirm is due to this issue but certainly worth to try out.
faizyunus
post Apr 6 2018, 09:41 AM

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QUOTE(soonwai @ Mar 28 2018, 09:30 AM)
Very nice. How is it different?

Do you mean VPN to Malaysia VPN server even though I’m already in Malaysia?
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Some DNS Servers may have different IP range responses for sites. Simple example would be Google.com, if you use TM DNS and Google DNS the IP response you get will be different.
Yup. It may help with the routing issue.

This post has been edited by faizyunus: Apr 6 2018, 09:45 AM
opjust
post Apr 8 2018, 11:36 PM

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Omg! Same bloody issue with me... I’m on unifi 50mbps... every night around 8.30-11pm Netflix is total nonsense...
ntah_le
post Apr 11 2018, 08:14 PM

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I dont think tm throttle only to netflix. Most likely the link to netflix cdn is congest. For CDN, its not provider server, its own by service/application owner. Since the behaviour only at night.. logical thinking.. night everybody watching netflix.. so the CDN able to give all user fair usage policy kind of balancing traffic..

If rhe provider has CDN with any content provider, it will be their own effort to do the cdn and caching to make users have good experience.. no provider able to make sure user get their "best effort internet service" to where user want to go.
Surkezz
post Apr 13 2018, 12:43 PM

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Suggested bandwith for 1080p video for netflix is 25M... if you subscribed 30M internet, sometime you can get full hd & sometime not if the internet also shared by other devices....
zainframe
post Apr 14 2018, 07:29 PM

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QUOTE(Surkezz @ Apr 13 2018, 12:43 PM)
Suggested bandwith for 1080p video for netflix is 25M... if you subscribed 30M internet, sometime you can get full hd & sometime not if the internet also shared by other devices....
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Only around 5Mbps is needed for 1080p. 4K UHD can be streamed using as low as 15Mbps (the bitrates will be low but it will stream in 4k at this speed). These speed requirements are not theoretical - I have tested them myself. I have a 100Mbps line which is not shared with any other device/service (at least while doing all the testing). The TV is connected directly via gigabit ethernet to the router.

It could be possible that Netflix's CDNs which I am connected to have maxed out their bandwidth (as suggeted by ntah_le) in which case someone has to answer about this (that would be Netflix since I paid for the 4k UHD package). However, I have spoken to Netflix and they claim that there is nothing wrong with their 'transmission'- a live test with them (they tested while I was on the phone with them) indicated that they can only stream 5Mbps to my device. This could be a tai-chi 'blame it on the ISP' statement from them, I dunno.

These past few weeks if I am lucky, between 8-10pm at night I am getting max 5Mbps/1080p streaming speed for Netflix (sometimes only 1Mbps/480p). If this is a TM issue it means I am only getting 5% of the total bandwidth I paid for every single night which does not make UNIFI a 'best effort' service.

This post has been edited by zainframe: Apr 14 2018, 07:30 PM
soonwai
post Apr 14 2018, 07:33 PM


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Is there anyway on iPad or iphone netflix app to display stats like what you have in a browser?
faizyunus
post Apr 18 2018, 03:58 PM

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QUOTE(soonwai @ Apr 14 2018, 07:33 PM)
Is there anyway on iPad or iphone netflix app to display stats like what you have in a browser?
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As far as I know no. I even tried the key combos with Bluetooth keyboard connected, it doesn't work.
XPS
post Apr 19 2018, 07:38 PM

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QUOTE(zainframe @ Apr 14 2018, 07:29 PM)
These past few weeks if I am lucky, between 8-10pm at night  I am getting max 5Mbps/1080p streaming speed for Netflix (sometimes only 1Mbps/480p).
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The problem is Netflix and they should escalate the country specific issues. Both the TV Neflix app speed test and many reliable speed tests confirm that getting a fraction, a small percentage of the speed tests, cannot be purely caused by Unifi traffic shaping (and you can tell whenever TM does shaping or have international link issues if you know what to look for and test). Been looking at this for a couple of weeks before posting here and its clearly Netflix as gaming traffic, buffer bloats (QOS for media) and everything that reasonably makes sense points to Netflix being the culprit.

For now, just report to Netflix and hopefully if they see enough reports, take some action. Its very obvious when YouTube is not affected.
zainframe
post Apr 19 2018, 08:50 PM

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QUOTE(XPS @ Apr 19 2018, 07:38 PM)
The problem is Netflix and they should escalate the country specific issues.  Both the TV Neflix app speed test and many reliable speed tests confirm that getting a fraction, a small percentage of the speed tests, cannot be purely caused by Unifi traffic shaping (and you can tell whenever TM does shaping or have international link issues if you know what to look for and test).  Been looking at this for a couple of weeks before posting here and its clearly Netflix as gaming traffic, buffer bloats (QOS for media) and everything that reasonably makes sense points to Netflix being the culprit.

For now, just report to Netflix and hopefully if they see enough reports, take some action.  Its very obvious when YouTube is not affected.
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I've spoken to Netflix a number of times - they claimed nothing is wrong on their side but as I said before this could be a taichi move from them. Also this past week I have started having problems with Amazon TV - more or less the same issue where my streaming fluctuates between SD/HD/UHD every few minutes. Any speedtests I tried including Netflix shows that I'm getting at least 85% of the 100Mbps at all times.

Really frustrating when all the service providers taichi-ing and denying. Unifi, Netflix and Amazon are not free services sad.gif.

XPS
post Apr 19 2018, 09:29 PM

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Its probably Netflix having bottlenecks at their end. On router side, application bandwidth monitoring, the traffic is not constant just like with YouTube. The peaks are a lot more than 5Mbps and if Unifi is the issue then the peaks will be that 5Mbps cap figure Netflix is claiming. Traffic shaping tends, as past experiences show, limit the speeds considerably.

For now its easy to blame Unifi however facts seem to point towards Netflix. Only recently had Netflix showed the poor bandwidth.

More investigations, seems that most of the Netflix servers are from SG with IPV6 server prefix. So far counting close to 18 servers. If you can turn on IPV6 it may help rclxms.gif

This post has been edited by XPS: Apr 21 2018, 07:53 PM
XPS
post Apr 22 2018, 10:33 PM

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Update. Seems Netflix servers with IPV6 prefix does improve the connection quality. Seen a lot of SG and some SYD servers with very little on MY side.
zainframe
post Apr 22 2018, 11:26 PM

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I dont think my TV supports IPV6 - if so anyway I can use IPV6 to access these servers via my TV? It's the only Netflix device that supports both Dolby Vision and Atmos.

I had a 1hr+ chat with Netflix a few days ago via their IM - I think the support guy slipped and implied that they suspect that the bandwidth to their CDN servers are overloaded. If so then they should pay for more bandwidth before selling us the service. I saved the transcript.

Anyway in the end I was AGAIN given the run around without any straight answer (the standard 'you should check with your ISP' answer).

It seems that when raising this matter to both TM or Netflix they would just blame the other party without really investigating the issue sad.gif. I told them that they should provide some evidence that the issue is not caused by their service before blaming the other party. But I am only a customer to them what do they care?

This sucks.
XPS
post Apr 22 2018, 11:42 PM

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QUOTE(zainframe @ Apr 22 2018, 11:26 PM)
I dont think my TV supports IPV6 - if so anyway I can use IPV6 to access these servers via my TV? It's the only Netflix device that supports both Dolby Vision and Atmos.
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You need to check if IPV6 is enabled on both the router and the TV and there is some connection algorithm on Netflix side that prefers IPV6 at least from tests past couple days. Using the TV mostly for Netflix and the "info" button is where the quality and bandwidth used is indicated. Seen probably 20 servers now (using the router packet inspection) and 90% are SG or SYD. Of the offshore servers almost all are indicating IPV6, therefore if others can confirm they are getting better results, we may be onto something.
wanttotree
post May 2 2018, 07:00 PM

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Hey guys, im back. As u know i battled this for the past a few months. I can comfirm cdn on sin00x which is the sg based cdn is NOT slow by any means even at peak hours(both ipv4 and ipv6), specifically 7pm-12am. Thats because both maxis fibre and time fibre are using sin00x at peak hours. The only difference is, both maxis and time never has speed issue towards six00x. I can vow for it since i just terminated my unifi 100mbps and replace it to 30mbps maxis fibre.

It is so funny that my 30mbps is sooo much better in term of netflix/video streaming. 4k hdr netflix is 100% streaming at 29mbit/sec 24/7.

Whoever wants to do an experiment of their own. I have a openvpn server running through my pfsense router which is connected to my maxis fibre 30mbps. Feel free to connect to it at peak hours. Pm me to connect to it for netflix purpose.

Cheers.

This post has been edited by wanttotree: May 2 2018, 07:02 PM
XPS
post May 4 2018, 12:07 AM

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QUOTE(wanttotree @ May 2 2018, 07:00 PM)
I can comfirm cdn on sin00x which is the sg based cdn is NOT slow by any means even at peak hours(both ipv4 and ipv6), specifically 7pm-12am. Thats because both maxis fibre and time fibre are using sin00x at peak hours. The only difference is, both maxis and time never has speed issue towards six00x. I can vow for it since i just terminated my unifi 100mbps and replace it to 30mbps maxis fibre.

It is so funny that my 30mbps is sooo much better in term of netflix/video streaming. 4k hdr netflix is 100% streaming at 29mbit/sec 24/7.
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You just evidenced TM doing traffic shaping, which is not surprising since TM has a lot of experiences, equipment and software going back to early Streamyx.

Unfornately, for low latency connections eg gaming, TM is still the most reliable compared to Time or Maxis.

So we now know that TM lets you speedtest at 100Mbps and then traffic shape to a low speed flr say Netflix. This may support the earlier suspicion that Netflix IPv6 connections seemed faster, probably as more people are on IPv4 connection.
zainframe
post May 7 2018, 12:30 AM

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QUOTE(XPS @ May 4 2018, 12:07 AM)
You just evidenced TM doing traffic shaping, which is not surprising since TM has a lot of experiences, equipment and software going back to early Streamyx.

Unfornately, for low latency connections eg gaming, TM is still the most reliable compared to Time or Maxis.

So we now know that TM lets you speedtest at 100Mbps and then traffic shape to a low speed flr say Netflix.  This may support the earlier suspicion that Netflix IPv6 connections seemed faster, probably as more people are on IPv4 connection.
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Guys,

I have brought this matter up with MCMC and TM has actually replied with an official letter to me saying that they do not practice 'bandwidth throttling' and the Netflix issue is not due to any intentional action done by them. It is a 2 page letter with the normal Fair Usage Policy, them not accountable for websites being slow, network congestion and other standard stuffs but they did OFFICIALLY replied to me stating that this is not their (intentional) fault nonetheless.

Any advice on how I should move on with this matter? Should I shove the letter to Netflix and put the ball in their court again? There will be a whole lot of ding-dongings and being pushed around for me again no doubt.

This post has been edited by zainframe: May 7 2018, 12:31 AM

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