2.4 GHz turning back on. Wildly fluctuating speed.

[nathfitz]

Hello,

I have the same issue as:

https://community.virginmedia.com/t5/Networking-and-WiFi/disobedient-sh3-wifi-keeps-turning-back-on/...

I have sh3.

In my office 5GHz gives much faster signal ~ 60Mb/s dropping from 100Mb/s at the router, so I turn off 2.4GHz which gives me 5-10GHz at my desk. (Not enough for video calls).

2.4 keeps turning back on and taking priority giving me slow internet.

Trying to report these technical issues via your normal means is difficult, so I thought posting here would get faster results.

Please can you send someone out to fix it or send me a new router which doesn't have this bug.

My account number is [REMOVED]

[MOD EDIT: Personal and private information has been removed from this post.]
 

[jbrennand]

rather than just turning off the 2.4 - try this and see if it helps...
_______________________

Go into the Hub3 settings. Type in  http://192.168.0.1  into your web browser’s url box and login with settings password on the Hub's base sticker (or your own if you changed it). Then in Advanced>wireless>smart wifi - tick the disable “channel optimisation” box or “Smart Wifi” box and save settings.  Then, go to advanced>wireless>security, rename the 2.4 & 5 GHz network ssid's.  Just change 'em to whatever you like and something that will differentiate them (e.g - xxxxx_2 & xxxxx_5) -- use the same password for simplicity,  Then, apply settings and restart the Hub.  Your 2 wifi networks will now be clearly separated - and you can then select the network you want to connect to individually from the "available networks" list on each device. 
Note all your wifi devices will need re-connecting to the new SSID's and passwords.
5 GHz is always better/faster and subject to less interference (and is better for iDevices ) than the 2.4 one - although the 2.4 one has the better "range" and some older/cheaper/dumber devices can only use this one. 

You should also use a wifi analyser App (or Airport Utility on iOS) to check which 2.4 channels are being heavily used around you and move yours to one of numbers 1,6,11 that is least so, but it wont help if there is other interference.

See if these changes help - you will lose any “seamless roaming” benefits but it may not matter and you can always change the settings back by doing a " pinhole factory reset " if you prefer the way it was - or it doesn’t help.

[g0akc]

I suggest you buy your own better router and use the VM hub in modem mode to avoid/lessen such issues.

Sending someone out or replacing the hub will likely be useless since the bug will, in all probability, be in the firmware, so on all of them, not just your unit - sooner or later it will crop up again.  

A technician won't be able to fix it at your property - only a software engineer who works on the code for VM and then a roll out of a new version to all hubs could.  Maybe some time.

In the meantime try splitting the bands (give 2.4 GHz a separate network name/SSID to 5GHz). Only enter the password for 5GHz on your chosen devices (password can still stay the same).  That way, even if 2.4GHz is on, the devices won't use it.

edit - John and I are essentially saying the same thing about splitting the bands, though he has kindly provided you with more details - the slight different is I am saying don't even connect the devices you're having this issue with to the 2.4GHz SSID.

[nathfitz]

Thankyou both,

What a simple solution!

I think this should work. 

[nathfitz]

This kept the 5GHz band on.

But unfortunately my internet speed still seems to wildly fluctuate. in the range of 3 - 70 Mbps. So I cannot have a successful video call.

I am surprised by this behaviour as I am only ~6m in a straight line from my router. There is nothing that should be cause interference with the signal. There is only a shower room between my desk and the router.

Kind Regards

Nathan

[nathfitz]

Surely the router must have an issue?
My speed is all over the place.

[nathfitz]

I have optimised the signal with the connect app. It seems to be faster now. We shall see...

[Andrew-G]

Connect to the hub by clicking on this link http://192.168.0.1/  That should pull up the log in page for the hub.  But don't log in, just click on the link "Check router status"  That'll bring up a window with five tabs.  Open the Downstream tab.  Select all the text (Ctrl-A if using a keyboard), copy it (Ctrl-C), then paste it (Ctrl-V) into a reply here as TEXT not screenshots.  Post that, do the same for the Upstream and Network log.  You'll get an error message when you post the Network log, just click on "post" a second time.  If you post screen shots that might seem convenient for you, but you'd need about ten screenshots, they often come out illegible when posted, and the network log will not be approved as a screenshot shows IP addresses (they're redacted automatically when you post as text).

Then we can check for any obvious problems with power, noise or error counts.

[nathfitz]

Speed is currently 30 Mbps by the router. Not working in my office. Here is the router. This is a regular occurrence and is extremely disruptive.

Router log

Downstream

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	138750000	3.2	36	256 qam	1
2	146750000	4	37	256 qam	2
3	154750000	3.7	37	256 qam	3
4	162750000	4	37	256 qam	4
5	170750000	4.3	37	256 qam	5
6	178750000	4.1	37	256 qam	6
7	186750000	4	37	256 qam	7
8	194750000	3.5	37	256 qam	8
9	202750000	2.9	37	256 qam	9
10	210750000	3	36	256 qam	10
11	218750000	2.7	36	256 qam	11
12	226750000	2.5	35	256 qam	12
13	234750000	2.2	35	256 qam	13
14	242750000	2	35	256 qam	14
15	250750000	3.4	36	256 qam	15
16	258750000	4.5	36	256 qam	16
17	266750000	4.8	36	256 qam	17
18	274750000	4.5	37	256 qam	18
19	282750000	4.1	37	256 qam	19
20	290750000	4	36	256 qam	20
21	298750000	4.1	36	256 qam	21
22	306750000	4.4	36	256 qam	22
23	314750000	4.9	37	256 qam	23
24	322750000	5	37	256 qam	24

[nathfitz]

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1	39400039	45.3	5120	64 qam	2
2	46200000	45.5	5120	64 qam	1
3	25800031	44.3	5120	64 qam	4
4	32600000	44.8	5120	64 qam	3

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	1	0