J

Visitor

 • 

3 Messages

Wed, Jul 20, 2022 4:42 AM

Owned Netgear C7100V problem

Does Comcast firmware updates on Netgear c7100V modem/routers?  

Doesnt happen on a regular basis.  Usually family complains of 'no internet' and when I log in to router, I see all network names reset and passwords reset.  Manually have to  go in and change the names/passwords back to what every family member/devices use.

Cannot find find anywhere to  disable 'auto upddate'

???

Thanks in advance

Accepted Solution

flatlander3

Problem Solver

 • 

536 Messages

2 m ago

Xfinity does manage the firmware on 3rd party gateways/modems.  Do they?  Very infrequently, and likely will take months to get a security update, if ever.

I'm a bit confused though.  Here's the manual.  What setting/feature are you having to change?

https://www.downloads.netgear.com/files/GDC/C7100V/C7100V_UM_EN.pdf

Visitor

 • 

3 Messages

@flatlander3​   has happened 4 times in the last 2 months.   My 'named' networks will have reverted back to 'Netgear 2.4 ' and Netgear 5.0' with default passwords.  Problem being everyone's devices usually connect to wifi using network names/passwords that I specify.  Just wondering why this happens every so often.  

It all started with family members complaining 'no internet', and not being able to see the networks they usually see, as I had set them.  BTW, c7100v is currently on v2.01.45

Next time it happens, I will screenshot event logs... stupid of me not to have done so before.

Thanks for the reply!

Visitor

 • 

1 Message

Exact same thing happened to me today, same model and firmware as you.  The router went through a full factory reset on its own (suspect something triggered it from the xfinitity side).  Had to set everything up again......

Accepted Solution

flatlander3

Problem Solver

 • 

536 Messages

2 m ago

I've seen the Netgears reboot due to line/signal conditions, but I've never seen one tip over, lose it's config file and revert to default.  You can save a config file under advanced-->backup and restore it easy enough, but it shouldn't be happening in the first place.

That usually indicates an internal power supply/hardware problem.  It may not be long for this life.  Heat can do it, is the thing getting hot or it's power supply?  You can try plugging it into a different circuit if you can, but if the hardware is flaking, that won't help.  If the thing is covered in dust, blast it out with a can of compressed freeze spray or computer cleaner, especially that toothpick reset hole.

I'd also make sure remote management/access is shut off, and change the default admin password, but that probably isn't the problem.  Barring deliberate subterfuge trying to reset parental controls or something, I'd say hardware issue.

Anyone else ever see this?

Visitor

 • 

3 Messages

@flatlander3​  config file has been my method to restore after the 1st time it happened.  It is hot- temp is 43°C (which is just over spec), but completely clean. Not sure its 'normal' temp,   Have never used the reset button, so its not getting 'stuck'. Also on its own circuit. Admin password always changed to something diff each time this happened.  No issues with kids being sneaky.

I'm guessing hardware issue,  its been a few years.  Just looking for some info before shelling out for a new one.


Thanks for all the tips!

flatlander3

Problem Solver

 • 

536 Messages

2 m ago

@user_15e861​ Consumer grade parts are 0C-70C rated, so the temp is pretty good actually.  Might sound hot but it isn't.  You might have a flash part wearing out though.  They're good for lots of writes, until they aren't. 

Visitor

 • 

1 Message

2 m ago

The default/loss of configuration seems to be related to ISP pushed firmware updates. This has happened a few times last year and just yesterday. Current firmware at my location is V2.01.45 with NetGear's C7100V Cable Modem Router site listing V2.01.42. See https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-modem-router for the discrepancy.  

forum icon

New to the Community?

Start Here