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vickycb
On our wavelength
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VMDG480: frequent manual restart needed

Hi

I have a VMDG480 and I'm being forced to manually reboot the device veru frequently (turn off and on) as I often find my devices (laptop, phones, tablets , etc) all seem to disconnect from the Wi-Fi or remain "connected" but can't connect to the internet. To compound this, I often find the web interface (to manage the router) slow or unable to load in a browser.

Am I alone or do others have similar issues and I'm wondering whether the device is faulty and needs replacement?

Any suggestions on how to correct my issues (troubleshoot) or proceed with replacement?

Many thanks!
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Forum Team
Forum Team
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Message 15 of 15
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Re: VMDG480: frequent manual restart needed

Hello vickycb,

Thanks for posting Smiley Happy

I really appreciate all the diagnostics that have been completed so far. I can see you're using a Superhub that you've had for quite some years. I'm happy to replace this for you. Please drop me a PM confirming your delivery address and then I'll place an order.

Speak with you soon,

Take care.

Heather_J

Tech fan? Have you read our Digital life blog yet? Check it out



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Dave_cq
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Message 2 of 15
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Re: VMDG480: frequent manual restart needed

Hi Vicky,

It may be your hub breaking down or it may simply be an issue with power levels on your connection.  Can you post your Upstream and Downstream data please.  To do this enter 192.168.0.1 into your browser's URL which should take you to your hub's management pages.  Do NOT sign in but simply click on Router Status where you will find the data pages.

 

 

********* SuperHub 2ac - Asus rt-ac68u Router - Vivid 100Mbps **********

Electron
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legacy1
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Message 3 of 15
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Re: VMDG480: frequent manual restart needed

modem mode and your own router will fix that.

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vickycb
On our wavelength
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Message 4 of 15
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Re: VMDG480: frequent manual restart needed

Hi Dave

Thanks for the reply! I had to turn the router off/on a few times to eventual gain access to the web interface, anyway below is the information requested. 

Does this help?

Vicky Smiley Happy

 DS-1DS-2DS-3DS-4DS-5DS-6DS-7DS-8
Frequency (Hz)234750000 Hz202750000 Hz210750000 Hz218750000 Hz226750000 Hz242750000 Hz250750000 Hz258750000 Hz
Lock Status(QAM Lock/FEC Sync/MPEG Lock)LockedLockedLockedLockedLockedLockedLockedLocked
Channel ID139101112141516
ModulationQAM256QAM256QAM256QAM256QAM256QAM256QAM256QAM256
Symbol Rate (Msym/sec)6.9526.9526.9526.9526.9526.9526.9526.952
Interleave DepthI=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
Power Level (dBmV)0.7 dBmV0.9 dBmV0.5 dBmV-0.1 dBmV-0.7 dBmV0.5 dBmV0.4 dBmV-0.2 dBmV
RxMER (dB)43.9 dB43.9 dB40.7 dB42.7 dB40.3 dB43.8 dB43.9 dB43.2 dB

 

 US-1US-2US-3US-4
Channel Type22N/AN/A
Channel ID3739N/AN/A
Frequency (Hz)45800000 Hz27400000 HzN/AN/A
Ranging StatusSuccessSuccessN/AN/A
ModulationQAM64QAM64N/AN/A
Symbol Rate (Sym/sec)51200005120000N/AN/A
Mini-Slot Size128128N/AN/A
Power Level (dBmV)45.8 dBmV43.5 dBmVN/AN/A
T1 Timeouts00N/AN/A
T2 Timeouts00N/AN/A
T3 Timeouts00N/AN/A
T4 Timeouts00N/AN/A

 

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Dave_cq
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Message 5 of 15
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Re: VMDG480: frequent manual restart needed

Hi Vicky,

Those stats are fine, Upstream & Downstream power levels and Signal to Noise Ratios are all within specification, so nothing obviously wrong revealed there.

Perhaps it is an intermittent fault within the hub and a replacement might sort things out.

The one thing we haven't covered is the possibility of Wi-Fi interference from a neighbour's setup, so you could try changing the Wi-Fi channel ... see the video tutorial at the top of this Networking & Wireless forum.   If you do change channel stick to either 1, 6 or 11.

 

 

 

 

********* SuperHub 2ac - Asus rt-ac68u Router - Vivid 100Mbps **********

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Sephiroth
Alessandro Volta
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Message 6 of 15
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Re: VMDG480: frequent manual restart needed

Dave is being too kind to VM!

The VMDG480 is a total fail, particularly on wireless. It is short of memory, short of CPU power and useless except in modem mode.

One its major faults is the reason why you have to reboot regularly. Its buffers can get so clogged that it has insufficient memory to deal with the data backlog and latency just grows (the search keyword RAMPING will reveal a mega-thread on the topic).

The VM bods tale a week or so to get to the thread and it's likely they'll declare your hub faulty and arrange a new model to be sent out. If you prefer you can call it in and maybe get a result (or a verbal wrestling match with an offshore agent who has never used any SH model).

Keep us posted.

Seph - ( DEFROCKED - My advice is at your risk)

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vickycb
On our wavelength
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Message 7 of 15
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Re: VMDG480: frequent manual restart needed

Hey Dave

Thanks for the prompt reply. I've been through the loop of changing the Wi-Fi channels before (a friend helped me with this). Currently the router is manually set to channel 8. I have an app on my phone (Wi-Fi Analyser) which still shows channel 8 sitting nicely in a gap between strong signals from my neighbour(s) which looks to be grouped on channels 5 and 11 (and lots much lower down the scale too). 

Does this suggest the intermittent fault you suspect is now the most likely cause? If so what's the next step?

Thanks again for all your help! Smiley Happy

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Sephiroth
Alessandro Volta
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Message 8 of 15
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Re: VMDG480: frequent manual restart needed

Wireless Freqs.gif

With regard to Channel 8, you'll see from the data above that Channel 8 overlaps with 4, 5, 11,12.   But, as I said, the VMDG480 is a complete fail at all levels.

 

Seph - ( DEFROCKED - My advice is at your risk)

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vickycb
On our wavelength
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Message 9 of 15
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Re: VMDG480: frequent manual restart needed

Thanks Sephiroth

The chart is useful, yes channel 8 isn't ideal, *but* it's the only gap I see in my immediate vicinity (high density terrace housing). Not want to waste countless hours on the phone to VM, is the next step simply sit back and hope someone from VM event reads this post and takes action - is this likely, just lengthy as your earlier post suggests?

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Sephiroth
Alessandro Volta
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Message 10 of 15
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Re: VMDG480: frequent manual restart needed

The answer to high density wireless conflict is usually to have the 5GHz channels available. There are way more 5GHz channels that don't overlap. If your devices are 5GHz compatible, you can either set the wretched VMDG480 to 5GHz and choose an uncontested channel, or you can await a Hub 3 which is dual channel.

Seph - ( DEFROCKED - My advice is at your risk)

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