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Level 2: Rookie

Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 seconds

Hi All

As stated in the title- having problems with latency on my wifi. FTTC connection with Smart Modem Gen 2

Here's what I've tried:

  • I disabled band steering as it was throwing my wifi between the 2.4 and 5ghz networks and in doing so was making the problem worse. 
  • since doing this, my wifi is split into two different SSID to make it easier for me to isolate the issue
  • I removed all devices from the 5GHz band, except this PC
  • When I do a ping test from my iPhone (on the 2.4 channel) theres no ping issues. A bit slower on the speed test, and a higher latency (around 20ms) but not alarm bells
  • When I ping test from this PC the below CMD screenshot happens.
    • Either I get a "Request timed out" every 20-30 seconds
    • Or I get a Huge Ping Spike (over 1500ms) then back to under 10ms
  • I suspect it has somethign to do with another network/device interfering but I cant seem to find this mysterious device/network.

Heres my wifi analyzer results (highlighted yellow are the only other two 5GHz WiFi)

Green text is my currently connected 5GHz WiFi.

Interestingly the one underneath my greentext one has a hidden SSID but an incredibly similar BSSID - could this be the culprit?!

 

Heres my modem diagnostics 5GHz scan

 

Modem Details:

 

cmd > ping www.google.com -t 

every 60 or so seconds either "Requesst Timed Out" or >1500ms result then it goes back down

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12 REPLIES 12
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Level 24: Supreme Being
Level 24: Supreme Being

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

The hidden SSID is actualy from the modem and is used as the backhaul channel when a WiFi booster is connected to the modem.

 

Suggest you check the modems log for any WiFi events.

 

A couple of things you could try

  1. Change the 5 GHz WiFi channel. I noticed there is a neighbour using channel 36 and the power level of -74 dBm could cause interference.
  2. One thing you could try is disabling Wi-Fi PMF on the modem. Older devices that don't support PMF can cause problems.

 

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Level 2: Rookie

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Hey CF4! Thanks for your reply

 

Thats good to know about the hidden SSID!

 

On your suggestions:

1. I have tried other channels but doesnt seem to make much of a difference

2. PMF is disabled (I think by default) on both bands

 

The only other thing that made a difference was (wierdly enough) our new fridge which has wifi diagnostics capability. 

Last week I tried to run diagnostics on my fridge - so I tried to connect to its wifi network. I left the network searching for a while and that was causing ping spikes basically every 6-10 seconds

I turned the wifi off on the fridge (what a wierd sentence) and it got a little better but still having issues now so it makes me think there could be another device?

 

The only other devices in the house which it could be are

 

microwave (a good 20m away from the modem)

Fridge (LG)

Telstra TV (15m away from modem)

 

Do you have any other suggestions?

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Level 24: Supreme Being
Level 24: Supreme Being

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

If you do a ping test from the iPhone connected to the 5 GHz do you get the same result.

 

When you changed WiFi channels did you do another WiFi scan to check the hidden WiFi at -74dBm did not also shift.

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Level 21: Augmented

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Which band does the fridge use? and are you able to turn the fridge wi-fi off or disable it, to run some diagnostic tests without it interfering?

 

The LG fridges use the LG Thinq network (usually as a hub/router), do you have any other devices on that network. Does the Thinq IP range clash with the Smart Modem IP range?

Stevo 52
Too many devices, probably an addict :-) also a tinkerer and developer of stuff..
Not with Telstra, just another customer like you!
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Level 2: Rookie

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Ping test on iPhone connected to 5GHz gives me the following

Sent 120
Recieved 120

Lost 0

 

Min ping- 7ms 

Max ping 112ms

average 17ms

 

Changed wifi channel to channel 52 (DFS) and theres nothing else on the channel in my scan 

Highlighted in blue is the network you were referring to

 

Heres my latest ping test results on the 5GHz on the PC (nothing else on the network)

Highlighted
Level 2: Rookie

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Thanks Steve

 

According to LG's Website 

"LG products featuring ThinQ function and the LG ThinQ app only support 2.4GHz Wi-Fi frequency band via any Home Network access point router.

 The LG ThinQ app will not function within a home Wi-Fi network operating its wireless signal distribution within the 5GHz frequency band. It just won’t work."

 

So I cant see it being the fridge Smiley Sad

However I will take your advice and switch off the fridge momentarily and run the test 

 

Highlighted
Level 21: Augmented

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

I agree, I didn't think it would be as long as it was behaving normally, but finding the source of Wi-Fi interference can required a wide approach..

 

Not sure what sort of mobile you have, but on my Pixels I use Wifi Analyser and KaiBits Network Signal Info as basic sniffers - then walk around - cheaper than a Spectrum Analyser  :-) 

 

The regularity of your issue makes me think it is something doing an ET (trying to call home)...  it may not be anything you have, but a neighbour..  I once found a security system that was scanning for available networks on a timed basis..  I though that was a bit dodgy and once that system was replaced it was all good. I also had a problem with a Solar controller, but that was in the 2.4 band.

Stevo 52
Too many devices, probably an addict :-) also a tinkerer and developer of stuff..
Not with Telstra, just another customer like you!
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Level 24: Supreme Being
Level 24: Supreme Being

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

The fact that it only effects the PC on the 5GHz WiFi band and not the iPhone tends to indicate it is the adapter on the PC causing the problem.

 

One thing I did notice that the hidden network broadcasting on 5GHz band at -74 dBm is no longer broadcasting so can probably rule that out as the cause of problem.

 

Do you have same problem on the PC when it is connected to the 2.4 GHz WiFi network.

 

 

 

On my Android devices I use Analiti. It is the equivelent of the swiss army pocket knife. The basic app is free, not only does it scan nearby networks and provides a lot of detailed information it also has a lot of other network tools. Unfortunately there is no equivelent app for IOS devices due to the way apple locks down the network functions on its devices. None of the networking apps for IOS even have a scanner function. The best network app I could find for IOS devices is Fing.

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Level 21: Augmented
Level 21: Augmented

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Hi - the Analiti App is certainly impressive. Apple's IOS does support Apple's Airport Utility which has an inbuilt Scan function but not as feature rich in terms of information as Analiti; it has no graphs. It also works iPad and Mac OS. In the iPhone and iPad, you need to first temporarily set Wi-Fi Scanner ON in the Settings/Airport Utility screen and turn it OFF after you finish. Open Airport Utility and select SCAN - it will continually update the screen. When finished, make sure you go back to Settings/Airport Utility to turn it OFF, otherwise it will drain your battery. 

 

@SmokinAces  - I tend to agree with @cf4  in regards to something in the PC maybe - is the Wi-Fi Adapter in a laptop with current driver or in a PC Desktop PCIe card slot or USB Wingle firmly in? With so many channels available in the 5Ghz band, I would not expect interference from other Wi-Fi devices and there is only one neighbouring 5Ghz Access Point at marginal connection distance(-91dBm) .

 

1. Do you get the same result targeting other ping test addresses

2. Are you using Telstra DNS Severs or customised the settings to a third party DNS provider.

3. Does a  tracert google.com  command connect you to Google without these interruptions 

4. You an rule out the microwave oven - they are limited to 2.4Ghz by regulation. 

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Level 24: Supreme Being
Level 24: Supreme Being

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Hi @Mkrtich 

Thanks for the information. I had previously tried the app before and was not aware that wifi scanning for the app had to be switched on in the devices settings. I had deleted app as I could only see a use for it if you had a Apple router or other Apple device. Compared to Anality the information on nearby networks is very basic only providing SSID, MAC address, RSSI and channel.

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Level 21: Augmented
Level 21: Augmented

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

Yes, it is very basic information in the iOS devices screens and can be used on any Wi-Fi network. The Mac OS has a more comprehensive and user friendly Scan view (hidden menu) of all networks but not the graphics in Analiti. It's disappointing that Apple exited the Router business a few years ago by removing the Airports from their ecosystem just when the industry is on the cusp of a new generation of Wi-Fi 5 and 6/6e technologies that are in an exponential growth mode. The IT industry is full of 'fast and furious' product life cycles and companies come and go just as fast, not unlike Cisco/Linksys entry and exit from the home market. 

 

Apple never really valued the full opportunities of the home Wi-Fi market and abandoned it a few years ago. During that time they understandably preferred to partner with Cisco in the Enterprise space due to their presence there, however Apple do resell other vendor Wi-Fi equipment for the home market on their web pages.

 

One of their original Wi-Fi technologists was so frustrated with their indifference to Small Business, Enterprise and Wide Area Wi-Fi opportunities, he left the company in 2005 and established a 'small' specialist Wi-Fi company called Ubiquiti ! It turned out to be an interesting success with some recent financial challenges which potentially makes it an attractive takeover target. Maybe a 'back to the future' opportunity there.

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Level 24: Supreme Being
Level 24: Supreme Being

Re: Help! -- FTTC: Smart Modem Gen 2 RandomPing Spikes (Over 2000ms) on 5GHz Network every 20-30 sec

@SmokinAces 

Did you have an WiFi analyzer app running on the PC when performing the ping test? A WiFi Analyzer can cause ping spikes and even missing packets as it disconnects the WiFi adapter from modem to periodically scan for other networks.

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