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Modem/ Router dropping all 5G connections every 12 hours. Netgear Model # C6000v2. Firmware V1.03.04
Hi - I was wondering if anyone has come across this before. The modem/router drops all wifi connections to all devices (5 total) exactly 12 hours after it has been restarted. When this happens the network for the 5G connection completely disappears and the Nighthawk app can not connect (not surprizing because the network is no longer there). I've restarted via the manual button on the back and via the Nighthawk app and each time the 5G network reappears, only to disappear 5 hours later. I have not done a factory reset yet. When the network disappears I don't see any of the lights on the router changing (unless I'm missing something). Also - a little background - prior to working this 12 hour issue, the issue would present itself randonly several times a day. I checked the connections and pulled the wall plate and found a splitter in the coax path. I was getting this error message in the Event log "Critical 3 No Ranging response received", so I was thinking maybe I have problems with the coax. I removed the splitter and reconnected the router and now I'm here with this 12 hour issue. Marginally better. Also I can no longer open the Event log. The Nighthawk app just spins if I try to access that log (the rest of the app seems to work just fine).
I was thinking that it might be that the DHCP lease renewal is not occuring correctly at the timeout interval but I'm concerned that the 5G network just completely disappears. I would think if a renewal didn't happen correctly, the network would still show up on my phone or laptop, so I could manually connect. Since I can't access the log I'm flying blind as to what might be causing this. Also I tried searching around on the Nighthawk app for where to time for the DHCP is set and can't seem to find it. Did a number of serarches on this problem but nothing has come up that solves the issue.
If anyone has some thoughts on this I would be very helpful. Also - I rent this condo and I'm trying to help debug the issue with the owner - that's why I haven't tried to do a factory reset - yet.
John
7 Replies
Hello,
It sounds like you've done some troubleshooting already, but there are a few more things you can try to resolve the issue.
Check for firmware updates: Make sure that your router has the latest firmware updates installed. You can check for updates in the Nighthawk app or by visiting the Netgear website.
Check for wireless interference: If you live in an apartment building or a densely populated area, there may be wireless interference from other routers. Try changing the channel on your router to see if that helps. You can also use a Wi-Fi analyzer app to check for interference.
Disable IPv6: Some routers have issues with IPv6 and it can cause problems with the DHCP lease renewal. Try disabling IPv6 on your router to see if that resolves the issue.
Enable static IP addresses: Instead of relying on DHCP to assign IP addresses, try assigning static IP addresses to your devices. This can help prevent issues with DHCP lease renewal.
Factory reset: If none of the above steps work, you may need to perform a factory reset on the router. Before doing this, make sure to backup any important settings or configurations.
Regarding the DHCP lease time, you can usually find this setting in the router's configuration page. It may be listed under "LAN," "DHCP," or "Network."
If the issue persists, it may be worth contacting your ISP or Netgear's customer support for further assistance.
Busch965 wrote:
Hello,
It sounds like you've done some troubleshooting already, but there are a few more things you can try to resolve the issue.
-
Check for firmware updates: Make sure that your router has the latest firmware updates installed. You can check for updates in the Nighthawk app or by visiting the Netgear website.
That one could be a waste of time.
The C6000v2 is a cable modem/router. The firmware is beyond your control. Only your ISP can do anything about that.
The firmware level is V1.03.04 and the Netgear site shows this as the current level for COX (the ISP). Comcast approves the V1.03.13 level but I'm not ready to move beyond the level set by COX. The NightHawk app does not show any pending firmware updates.
-
Thanks – all of these are good recommendations. I’ve given them some thought and decided on the following approach (original questions are in Italics to preserve clarity on the reply):
Check for firmware updates: Make sure that your router has the latest firmware updates installed. You can check for updates in the Nighthawk app or by visiting the NetGear website.
I did a check the NetGear website and the current level on the router is V1.03.04, which NetGear lists as the supported level.
Check for wireless interference: If you live in an apartment building or a densely populated area, there may be wireless interference from other routers. Try changing the channel on your router to see if that helps. You can also use a Wi-Fi analyzer app to check for interference.
I used the analyzer in the NetHawk app to check the channels. This channel (153) doesn’t seem overly used. There are 3 other networks on this channel. Many of the other channels have up to 7 networks. I did notice that channel 149 is open with no current networks on this channel – so that channel could be an option. While sharing the channel might be a factor to consider, I’m having difficulty imagining a scenario that would produce the problem symptoms I’m seeing. The router ceases to advertise the wireless connection and all devices connected to the router lose their connections exactly 12 hours after the router is rebooted. I use the reboot time from the NetHawk interface to confirm this. Someone on another channel would have to do something to interfere with my routers network at precisely 12 hours after my router rebooted – and match that pattern every 12 hours without any drift in time.
Disable IPv6: Some routers have issues with IPv6 and it can cause problems with the DHCP lease renewal. Try disabling IPv6 on your router to see if that resolves the issue.
I did see a reference to this in some searches on this problem. I came across a note that was concerned that there was a problem (for IPv6) in the chip set that NetGear could not figure out how to overcome (but I’m read so many notes on researching this problem that I’m not sure I could even find that note again – and I don’t know the date of the note or if it pertained to my router. I think it is a good idea to try and turn it off. My biggest problem is figuring out where to turn it off. I can only see the options that are present under Nighthawk. I keep thinking if I could log on to the admin on the router I would see a much larger parameter list.
Enable static IP addresses: Instead of relying on DHCP to assign IP addresses, try assigning static IP addresses to your devices. This can help prevent issues with DHCP lease renewal.
Could be useful in debugging but could not be a long term solution because the owner of this condo rents it out to several tenants during the year.
Factory reset: If none of the above steps work, you may need to perform a factory reset on the router. Before doing this, make sure to backup any important settings or configurations.
Leaning toward this to ensure that everything is a cleaned up as it can be on the router before additional trouble shooting. Still checking with the owner but I believe the 5G name and passphrase and the admin password are the only changes since opening the box for the router.
Thanks again for your help. I’ve never logged on to a router before this researching this problem so it’s been a learning experience for me.
I'd try a factory reset so you can access the GUI to get the cable connections page and event logs.
Those are a bit key with cable modem/routers.
Do wired devices drop?
Thanks. I did find one hit from someone that said the factory reset restored access to the Event Log. We will try that.
There are no wired devices to the router. All connections are wireless.
