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C7000-100NAS Slower WiFi speed vs wired connection

sheeniz
Aspirant

C7000-100NAS Slower WiFi speed vs wired connection

Have C7000-100NAS on Comcast with a 500Mbps plan, have never got the speed of more than 200-250Mbps on any of my devices and all of them are connected wirelessly. While troubleshooting with Comcast support, was asked to connect directly to the Modem/Router through the wired connection. This gave me a speed of 550Mbps and Comcast confirmed that its issue with my router and everything configuration from their end is correct. Looking at the number it makes me believe too. 

 

I checked the configuration on the C7000 and it seems it is capable of delivering (600 Mbps + 1300 Mbps) on 2.4GHz and 5GHz, I played around in the configuration to analysis the channel and moved around them to test if that will improve the speed. But nothing seems to be improving the wireless speeds. 

 

My apartment is considerably small in size and all the devices are in very close vicinity of the C7000. 

 

Any help will be appreciated 

Model: C7000-1AZNAS|Nighthawk AC1900 WiFi Cable Modem Router
Message 1 of 16

Re: C7000-100NAS Slower WiFi speed vs wired connection


@sheeniz wrote:

Have C7000-100NAS on Comcast with a 500Mbps plan, have never got the speed of more than 200-250Mbps on any of my devices and all of them are connected wirelessly.


You don't say what your wifi clients are, but that may be as fast as they can manage.

 

Are they a lot faster when you use them with other wifi sources?

 

How fast is your wired speed out of the router?

 

Your 500 Mbps determines the speed of wired stuff, not wifi.

 

This page from @duckware may be useful:

 

Understand Wi-Fi 4/5/6 (802.11 n/ac/ad/ax)

Message 2 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Thanks for the answer and specially for the link it has some great details. 

 

Client devices I have tried with Mac, iPhone11 and iPadPro. 

Message 3 of 16

Re: C7000-100NAS Slower WiFi speed vs wired connection


@sheeniz wrote:

 

Client devices I have tried with Mac, iPhone11 and iPadPro. 

 


Should be faster.

 

 

Message 4 of 16
labatt
Mentor

Re: C7000-100NAS Slower WiFi speed vs wired connection

Agree a iPhone 11 should do better. I have a 1 gig plan and my iPhone 10 gets 451Mbs down and 43.6Mbs up currently. ISP is Comcast. So would figure that on a 500 plan should pretty much max as long as the iPhone is only device creating traffic. 

Message 5 of 16
FURRYe38
Guru

Re: C7000-100NAS Slower WiFi speed vs wired connection

AC1900 (600 Mbps @2.4GHz with 256 QAM support +1300 Mbps @5Ghz 11ac)†
• Simultaneous Dual Band WiFi—Tx/Rx 3x3 (2.4GHz) + 3x3 (5GHz)


Maximum wireless signal rate derived from IEEE standard 802.11 specifications. Actual data throughput and wireless coverage will vary.

 

Use WiFi SweetSpots app on your devices to see the connection rate beween the device and the modem.


@labatt wrote:

Agree a iPhone 11 should do better. I have a 1 gig plan and my iPhone 10 gets 451Mbs down and 43.6Mbs up currently. ISP is Comcast. So would figure that on a 500 plan should pretty much max as long as the iPhone is only device creating traffic. 


 

Message 6 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Still not able to figure it out

 

Wifi SweetSpot shows the same 200Mbps

https://ibb.co/WzBwCgj

 

Wifi configuration show TX rate of 1+ Mbps
https://ibb.co/HHQNJ9w

 

Confimed using another Wifi network and number seems to match the speed I was getting on that network:
https://ibb.co/sv02MRN

Message 7 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Tried this morning and seem to be getting 284Mbps, not sure what is stopping the router to give maximum speed.

 

https://ibb.co/sPKbKB2

Message 8 of 16
FURRYe38
Guru

Re: C7000-100NAS Slower WiFi speed vs wired connection

So the connection rate between your wireless device and the modem is around only 200Mbps, This is limiting seeing any faster speeds when speed testing. So your wireless device is only connecting at 200Mpbs or possible the modem could be faulty. Does the modem show which frequency the device is connecting at? 2.4 or 5Ghz? Seems like only 2.4Ghz. 

Message 9 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Wifi is configured for 5GHz and router shows the devices connected to the same frequency. 

Message 10 of 16
FURRYe38
Guru

Re: C7000-100NAS Slower WiFi speed vs wired connection

Well if your phone is working right, and the modems wifi is configured right, there should be a 1300Mbps connection rate between the phone and the 5Ghz radio. 

Message 11 of 16
AI8UTAPAO
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Same problem.

Ran speedtest and it showed lower than expected internet speeds on 2.4 ghz devices than expected. Contacted ISP and service was diaspatched. We checked router settings, cable connections and all were fine. We disconneted the cable from the C7000 and the service tech tested the line with a meter showing we were getting communication speed slightly above what we were contracted to use.

Here is what I didn't know before the Tech explained the slow 2.4 speed.

Connectivity to the 2.4 Ghz wifi network and routing to other 2.4 Ghz devices within the network are only impacted by the amount and size of data being sent at any one time. 

Connectivity to the 5 Ghz wifi network are the same.

However.... router communication to the ISP is controlled by the ISP by Band and by Channel at the Router.  So 2.4 Ghz & 5 Ghz communications are not intermixed going to/from the ISP nor equal (50% of the cable dedicate to 2.4 Ghz and 50% of the dedicated to 5 Ghz).

Analogy: Imagine the ISP's coax cable is a 1" pipe. Within that 1" pipe are 2 pipes called 2.4 and 5. We users do not know the size of these two internal pipes and their size is controlled by the ISP.  I am a Comcast Blast customer and as it turns out, the ISP allocated the 2.4 pipe to use 30% of that 1" pipe to the ISP and the 5 pipe uses 70% for internet access.

What the tech and I found was the 2.4 Ghz band traffic to the internet was being delayed by the router (so much data to the internet and the 2.4 pipe was to small to handle it). In otherwords, to many devices requiring internet connectivity (ie. Cloud services) on the 2.4 Ghz band. I moved devices that are 5 Ghz friendly off the 2.4 Ghz band and that helped a lot but introduced another minor problem:  Those devices that were able to communicate with other devices as long as they were on the same "network" broke lost communication with one another but that is another topic of discussion. 

The problem I am seeing is the product community is selling 2.4 Ghz products because of signal strength/distance and the ISP is reducing the 2.4 Ghz band (pipe) over their cable in favor of revenue generating video streaming. Who's stuck in the middle getting the same "Things look good on our end" from the Product & ISP Support?.... The customer.

 Try moving as many 5 Ghz capable devices to 5 Ghz one at a time checking each one. 

I moved almost half of my devices from 2.4 Ghz to 5Ghz, lost some functionality but my 2.4 Ghz devices are no longer having the problem they were before the move.

I am going to be very picky about buying Wifi devices that are only 2.4 Ghz.

PS. I did not have any luck with my ISP request to enlarge 2.4 Ghz and reduce 5 Ghz use between our house and ISP.             

 

 

 

 

 

 

 

       

Message 12 of 16
antinode
Guru

Re: C7000-100NAS Slower WiFi speed vs wired connection

> Here is what I didn't know before the Tech explained the slow 2.4
> speed.

 

   That's a very frightening way to begin a story.  (I've heard many
explanations of many things from many people.  Not every one was valid.)

 

> However.... router communication to the ISP is controlled by the ISP
> by Band and by Channel at the Router. [...]

 

   That's where your story stops making sense, and begins to sound (to
me) like a fairy tale which was created by a technician with more
imagination than factual knowledge.

 

> Analogy: Imagine the ISP's coax cable is a 1" pipe. Within that 1"
> pipe are 2 pipes called 2.4 and 5. [...]

 

   You can imagine that, but I claim that cable-TV ISP service does not
work that way.


> [...] as it turns out, [...]

 

   How, exactly, did you determine this?

 

> [...] the ISP allocated the 2.4 pipe to use 30% of that 1" pipe to the
> ISP and the 5 pipe uses 70% for internet access.

 

   What happens to the wired devices?  How big is that (imaginary)
dedicated "pipe"?

 

> I am a Comcast Blast customer [...]

 

   How fast is that service supposed/claimed to be?

 

   I propose an experiment.  Get hold of a computer with a gigabit
Ethernet interface, and connect it to your C7000.  Run a speed test
using that computer.  How much of your promised speed do you get that
way?  Which (imaginary) dedicated "pipe" is that, and how much capacity
does it leave for the other (imaginary) dedicated "pipes" which are used
by your wireless devices?

 

   What speed can you actually measure when using a computer/device with
a 5GHz wireless connection?  With a 2.4GHz wireless connection?  Can you
get those numbers to make any sense with your dedicated-pipe hypothesis?


   What happens if you run two speed tests simultaneously, on, say, the
wired computer and your fastest 5GHz wireless device?  How do those
dedicated "pipes" hold up then?

 

> Try moving as many 5 Ghz capable devices to 5 Ghz one at a time
> checking each one.

 

   It's certainly true that putting more traffic through the 2.4GHz
radio will reduce the capacity (speed) available to any particular
client device which uses that radio band.  That is entirely unrelated to
the communication between the router and the ISP.

 

> PS. I did not have any luck with my ISP request to enlarge 2.4 Ghz and
> reduce 5 Ghz use between our house and ISP.

 

   What kind of "not any luck" was that?  I'd expect a response like "We
can't do that."  (Because I doubt that they could do that.)


   In the real world, I claim, 2.4GHz and 5GHz (and wired-Ethernet, and
any other) communications _ARE_ intermixed going to/from the ISP.

 

   But why trust me?  For all you know, I could know less than your
technician.  Run the experiment.  Analyze (and reveal) the results of
your speed measurements.  (That science stuff is a miracle.)

Message 13 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Tried switching off the 2.4Ghz network but doesn't seem to help, speed is more or less same as before.

Message 14 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I
agrCtlRSSI: -36
agrExtRSSI: 0
agrCtlNoise: -86
agrExtNoise: 0
state: running
op mode: station
lastTxRate: 1053
maxRate: 1300
lastAssocStatus: 0
802.11 auth: open
link auth: wpa2-psk
BSSID: b0:b9:8a:dc:23:d4
SSID: Magic 😉
MCS: 8
channel: 153,80

 

 

Commandline output

Message 15 of 16
sheeniz
Aspirant

Re: C7000-100NAS Slower WiFi speed vs wired connection

Statistics directly from the router/modem, attached screenshot

Message 16 of 16
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