Router speed

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michaelkenward wrote:

Apologies for intruding on someone else's question, but this bit intrigued me.

 

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shadowsports wrote:

 

If you subscibe to speed above 75MBits and do not have people in the home consuming massive amount of bandwidth, QoS is not needed.

 

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The "turn off QoS" advice first kicked in for Gbps Internet, then nudged down to 500 Mbps and 300 Mbps. (I see reports that this is now Netgear's recommendation.) I don't recall seeing see it for 75 Mbps before.

 

Is there an "official" line on this?

 

I guess the question is what amounts to "massive amount of bandwidth"? Gaming is probably the main culprit here.

 

There IS a NG KB article, https://kb.netgear.com/972/How-QoS-improves-performance but it isn't new. Good supposedly for AC Routers, but it is sort of a mix of things, including switches. One interesting statement:

 

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A key to optimizing networks is to fix any severe bottlenecks. When the bottleneck is a router or a switch, QoS is likely to help. Here are guidelines to decide whether QoS might be useful:

• The speed of the Internet is lower than LAN speeds a typical user can achieve. Therefore, if the worst bottleneck is your Internet connection — outside of your equipment — QoS will not help it.

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If that is the determining factor, then almost every 1GB or lower ISP speed, assuming one has a wired 1Gbs cable connection and/or an AC wireless 866Mbps  connection, QoS is never needed.

 

The second item is also interesting:

 

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Bandwidth and traffic going from your LAN to the Internet is usually less than amount coming to your LAN. ISPs give less outgoing bandwidth intentionally, for economy, since most users upload less than they download from the Internet. QoS on routers, therefore, is most useful for traffic when outgoing from your LAN. For incoming traffic, any useful QoS has probably already been applied by your ISP.

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2 things it claims, incoming your ISP has already taken cares of priority? Also for outgoing, QoS is useful?

 

Huh, I have a hard time getting my head around that. Net Neutrality and all that would seems the ISP doesn't do any 'hinderence' or 'acceleration'? Outgoing? Hmm, might understand that, especially not everyone has a high-speed out. Many have 10% or less of the download speed. However, most probably don't do heavy uploads or run servers to the WAN.

 

One place it would help is for VIOP, those that have phone service via the Internet. I've got that, my upload speed is 12Mbps max., and no QoS on. Never had a phone problem, even when we've got a lot of devices running. However, that is clearly measured and handled within my MODEM, not the Router. Possible in that case the Modem has a built-in QoS function I can not change? If so, cable modem/router combo's might be a different case and need QoS enabled no matter what? I do use things like Skype and TeamViewer with high bandwidth usage and never had a problem without QoS? Skype did sometimes, but basically it was isolated to individual users at the other end. A majority of time there was no lag or sound problems.

 

If you Google when to use QoS I really can't find anything definitive recently. Many links are quite old, and apply to speeds generally available then (when it would be needed). There are 'papers' but they generally apply to corporate systems and how to identify RTP packets and handle those.

 

 

 

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I don't know of any official limit when it wouldn't be needed?