Nighthawk CAX80 not connecting to the internet (Mediacom)

[JEdgeston]

I moved to Pontiac, Il in June 2021. Once I was moved to Pontiac, I had to use the local ISP call Mediacom. Did research to find out that my Nighthawk CAX80 modem\router was approved to be setup on Mediacom's network. Everything was connecting find until Dec. 21. In Dec. 21 my Nighthawk CAX80 modem\router started loosing the internet connect. I was able to resolve the issue with a simple restart, until Sept. 22. In Sept 2022, I've lost my connection to the internet and was not able to reestablish a connection. I did my normal troubleshooting with Netgear and with Mediacom, but I still could not connect to the internet using my Nighthawk CAX80. I'm on the current Firmware version and checked for Firmware updates, but there are not new updates. I got so frustrated that I got a modem\router directly from Mediacom. I've been on my Mediacom modem\router for the past couple of days and there are no internet issues. The bad thing is I have a Nighthawk CAX80 modem\routher that I spent over $400 dollars for that I cannot use due to I cannot get to the internet. I would like to use my Nighthawk CAX80 router, instead of paying an additional cost for a modem for Mediacom.

Make and Model

Nighhawk CAX80

Firmware:

Firmware Version V2.1.4.2

[FURRYe38]

Has a factory reset and setup from scratch been performed since last FW update?

What are the front LEDs showing?

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-m...
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-mode...

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

[JEdgeston]

I discussed this issue with Netgear. I was informed that the agent has a fix for this issue, but would not tell me if this was a setting needed to be configured or provide a patch to correct this issue unless I paid a year support subscription. Is there another business in his world that has a bug in a product they produced, but holds their user hostage so that they can milk more money from their customers.

All of the things that was discussed in the response here was already done...

[FURRYe38]

Well if your in contact with NG support then you'll need to follow up with them then. 

Good luck. 

[plemans]

Most people don't actually get a hold of netgear support and end up on some scam/con site. 

Not saying its not as outside of the 90 days it does cost money. But they usually don't say "I have a fix, buy XYZ and we'll do it"

Its usually a charge up front if the device doesn't boot. 

so I'd be a bit leary. 

Do you have a screen snip of the cable connections page and event logs? 

[JEdgeston]

Right now my Nighthawk CAX80 router\modem is not connected to the Mediacom network. I'm using a Mediacom router\modem because I was forced to get out of desperation. I will be reconnecting the Nighthawk to the network on Saturday Oct. 1, because I don't want to pay an additional cost for Mediacom's router\modem. Once I have back on the Mediacom's network I will send you the Cable Connection information. 

[JEdgeston]

The issue is there is no gateway settings being established when the router\modem is rebooted.

Here is what I found out. The issue only happens when the router\modem gets rebooted or a power outage. What I have to do to resolve the issue is the following:

1. Reset the router\modem to factory settings.
2. Call my ISP to remove the router\modem from their network.
3. Have the ISP readd the router\modem to the network.

This will work awhile until the router\modem is reset again... Then I will have to start the process over again. Is there anyone in this forum doing the same thing? If so, have your issue been resolved? What was your resolution to this issue?

[FURRYe38]

Has a factory reset and setup from scratch been performed since last FW update?

What are the front LEDs showing?

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-m...
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-mode...

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

Well if your in contact with NG support then you'll need to follow up with them. Might ask to see if there is is beta FW available that could help with this.

@DarrenM 

[JEdgeston]

Everything that has been mentioned in this post has been done... I only posted just incase someone had to do the same things that I have done. 

I'm in contact with Netgear because this is a software issue. I will be seeing what NG has to say this Saturday. 

[FURRYe38]

Ok. Let us know how it goes. 

Good Luck.