Netgear R6700 V3 at 950Mbps Wired, want WiFi above 400Mbps

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VrQxt8
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Joined: 24 Jul 2022
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PostPosted: Sun Jul 24, 2022 16:46    Post subject: Netgear R6700 V3 at 950Mbps Wired, want WiFi above 400Mbps Reply with quote
I've got my R6700 V3 operating at 950Mbps Wired.

1)
Ensured all Ethernet LAN cables are Cat 6.

2)
Tried a:
Shortcut Forwarding Engine: Disable
Flow Acceleration: Disable
=> 350Mbps
Tried b:
Shortcut Forwarding Engine: SFE
Flow Acceleration: Disable
=> 450Mbps
Tried c: (Cracked it with this setup!)
Shortcut Forwarding Engine: CTF
Flow Acceleration: CTF & FA
=> 950Mbps (Wired)



Now, the question is:
How can I get my 5Ghz radio rate above 400Mbits/s (400Mbps)?
I can't seem to get the 1300Mbps possible with this router.

I'm set to 802.11ac only.
Have tried frame burst, etc.
Can't get the rate in the Status -> Wireless above 400Mbps
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dale_gribble39
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PostPosted: Sun Jul 24, 2022 17:15    Post subject: Reply with quote
N/AC- or AC/N-Mixed; but it would help to see basic and advanced wireless settings that you've set to see if something (else) is not optimal.
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PaulGo
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Location: Maryland, United States

PostPosted: Sun Jul 24, 2022 17:41    Post subject: Reply with quote
The 1300Mbps is theoretical and mainly advertising. It may be the maximum throughput for several wireless devices. With my RAX45 router (Netgear firmware) the maximum wireless is about 650Mbps. With my R7000P (DD-WRT) the maximum is over 600Mbps. Mu setup is SFE and CFT + FA. On my setup SFE works better CFA seems initially better but after several minutes it slows down to speeds less than SFE.
strange
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Joined: 18 Jun 2006
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PostPosted: Sun Jul 24, 2022 19:11    Post subject: Reply with quote
Mine is in client bridge mode. Using AC/N Mixed and CTF enabled.


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ho1Aetoo
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Joined: 19 Feb 2019
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Location: Germany

PostPosted: Sun Jul 24, 2022 19:25    Post subject: Reply with quote
This is the maximum link / PHY rate for 80Mhz channel width with 256-QAM modulation and 3 spatial streams.

The maximum possible throughput is ~70% of this.
And of course a router with 1Gbit LAN ports can't reach over 1Gbit.

So if we assume a PHY rate of 1300Mbit then the radios can't reach more than ~910Mbit of real throughput - and that as said only to clients that have 3 antennas and can handle 3 data streams.

For clients with 2 antennas the maximum throughput is ~610Mbit.

The maximum link / PHY rate is as said significantly higher than what can be transmitted as payload.

400Mbit is a strange number in any case

Either you didn't tell us the rate correctly or your router is set to 40Mhz and has only 2 antennas Smile
the-joker
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PostPosted: Sun Jul 24, 2022 20:05    Post subject: Reply with quote
And dont forget, if the default bridge is used br0 with the wifi/vlan1/wan, and CTF or CTF & FA the wifi performance is enhanced as a side effect, due to the interfaces aggregated under the bridge.
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nolimitz
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PostPosted: Mon Jul 25, 2022 10:02    Post subject: Re: Netgear R6700 V3 at 950Mbps Wired, want WiFi above 400Mb Reply with quote
VrQxt8 wrote:
I've got my R6700 V3 operating at 950Mbps Wired.


Now, the question is:
How can I get my 5Ghz radio rate above 400Mbits/s (400Mbps)?
I can't seem to get the 1300Mbps possible with this router.

I'm set to 802.11ac only.
Have tried frame burst, etc.
Can't get the rate in the Status -> Wireless above 400Mbps


Ok so you’re talking about the wireless link, i faced this issue with iPhone XS and R6700v3. Now the R6700v3 is at a remote location so i cannot test with my new phone regularly. Is this 400mbps link for all of your devices? What type of clients?
VrQxt8
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Joined: 24 Jul 2022
Posts: 6

PostPosted: Mon Jul 25, 2022 21:46    Post subject: Here are my details Reply with quote
Thanks everyone, a lot of good information.

One client is a Dell XPS 7590 laptop with a Killer(R) Wi-Fi 6 AX1650x 160MHz Wireless Network Adapter (200NGW).

Looks like according to Intel's site here https://www.intel.com/content/www/us/en/products/sku/211609/intel-killer-wifi-6-ax1650-xw/specifications.html
this is a 2x2. (So I believe this is only 2 spacial streams)

The other client is a Samsung S21 Ultra, according to Samsung's site here: https://www.samsung.com/global/galaxy/galaxy-s21-5g/specs/
Wi-Fi 802.11 a/b/g/n/ac/ax 2.4G+5GHz+6GHz, HE160, MIMO,
1024-QAM Up to 2.4Gbps Download / Up to 2.4Gbps Upload

...so not sure how many spacial streams here because I'm not sure which bands the 1024-QAM applies to, etc.

My guess is that 2x2 vs. the router's 3x3 has some kind of least common denominator.


Here are my settings details:
Interface: wl1 (5Ghz)
Radio Mode: AP
Network Mode: AC Only
Channel: Auto
Channel Width: VHT80 (80 MHz)
Extension Channel: lower upper
SSID Broadcast: Enable
Dynamic WDS Mode: Disable
Explicit Beamforming: Enable
Implicit Beamforming: Disable
Airtime Fairness: Disable
Sensitivity Range / ACK Timing: 500
Multicast to Unicast: Disable
Network Configuration: Bridged

Advanced Settings:
Authentication Type: Auto
Basic Rate: Default
Transmission Fixed Rate: Auto
CTS Protection Mode: Auto
Frame Burst: Enable
Beacon Interval: 100
DTIM Interval: 1
Fragmentation Threshold: 2346
RTS Threshold: 2347
Max Associated Clients: 128
API Isolation: Disable
Preamble: Long
Shortslot Override: Auto
TX Power: Auto
Bluetooth Coexistence Mode: Disable
WMM Support: Enable
No-Ack: Disable

Wireless Status Page indicates: Rate: 400 Mbit/s
PaulGo
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Joined: 01 Dec 2021
Posts: 289
Location: Maryland, United States

PostPosted: Mon Jul 25, 2022 22:32    Post subject: Reply with quote
My suggestion is to use a WiFi analyzer app which is available for your smartphone. You can also try a short preamble. Take the DD-WRT off of auto and select a channel which has minimal interference from your neighbors.
VrQxt8
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Joined: 24 Jul 2022
Posts: 6

PostPosted: Tue Jul 26, 2022 3:02    Post subject: Reply with quote
Thanks!
I suspect I'm about topped out at 400Mbps with a 2x2 client running on ac.

The following is by far the most comprehensive and clear website on the topic of speed and WiFi of all versions.
https://www.duckware.com/tech/wifi-in-the-us.html#PHY

According to the site above max PHY speed for 802.11ac 2x2 at 256 QAM is about 866Mbps and 16 QAM is probably max realistic ...so 390Mbps.
PaulGo
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Posts: 289
Location: Maryland, United States

PostPosted: Tue Jul 26, 2022 4:27    Post subject: Reply with quote
I have a Samsung S21 with my R7000P I can get over 600Mbps.
egc
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Location: Netherlands

PostPosted: Tue Jul 26, 2022 6:01    Post subject: Reply with quote
And how do you measure that?
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ho1Aetoo
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PostPosted: Tue Jul 26, 2022 6:42    Post subject: Reply with quote
VrQxt8 wrote:
Thanks!
I suspect I'm about topped out at 400Mbps with a 2x2 client running on ac.

The following is by far the most comprehensive and clear website on the topic of speed and WiFi of all versions.
https://www.duckware.com/tech/wifi-in-the-us.html#PHY

According to the site above max PHY speed for 802.11ac 2x2 at 256 QAM is about 866Mbps and 16 QAM is probably max realistic ...so 390Mbps.


It is no problem to achieve a PHY rate of 866Mbit.
You can post screenshots, I'm still not clear where you see the ~400MBit.

Also, you should specify exact rates.



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egc
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Posts: 12814
Location: Netherlands

PostPosted: Tue Jul 26, 2022 7:59    Post subject: Reply with quote
Samsung S21 tested against an R7800 , 5 GHz VHT80

PHY rate 866 Mb/s which is expected for a 2 stream 80 MHz device

Actual iperf3 throughput

Quote:
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
sender
[ 5] 0.00-10.03 sec 381 MBytes 319 Mbits/sec receiver
-----------------------------------------------------------


There is no interference and the router is in the same room

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PaulGo
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Posts: 289
Location: Maryland, United States

PostPosted: Tue Jul 26, 2022 10:59    Post subject: Reply with quote
I measure the speed my S21 with the Ookla speedtest app.
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