Cable Modems & Gateways

Discuss Cable (C and CM series) modems and gateway products.

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Discussions

CM3000 on Xfinity with 1200Mbit, onlt getting around 940Mbit with link aggregation
I just purchased a CM3000 for use with my Xfinity 1200mbit plan. It's currently running firmware 6.01.04. It was set up in link aggregation mode and connected to my router via ethernet ports 1 and 2....
emuman100
Mar 05, 2026 Place Cable Modems & Gateways
cm3000
50Views
0likes
9Comments
Poor cable connection error message
I have Xfinity internet service. I have the Netgear CAX80 router/modem that I own. This was recommended by Xfinity. I read in the forums that the incoming speed is to fast for the router/modem?...
MChang1
Feb 24, 2026 Place Cable Modems & Gateways
cax80
287Views
0likes
20Comments
2.4ghz not connecting
I have a CAX80. I recently just changed the SSID password and I noticed the cable connection was poor. We also just has a a small snow storm.. I have power cycled the router multiple times and same t...
SunnahWay
Feb 23, 2026 Place Cable Modems & Gateways
not listed
75Views
0likes
9Comments
CAX 80 injecting malformed TCP RSTs
I have a CAX80 that appears to be actively interfering with and terminating encrypted TLS connections by injecting malformed TCP Reset (RST) packets. This occurs even with the following disabled: ...
schplat
Feb 17, 2026 Place Cable Modems & Gateways
cax80
102Views
0likes
8Comments
CAX30: Can't connect using WiFi after Netgear Armor trial period ends
I have a fairly new Nighthawk AX6/CAX30 modem/router, using it with Cox, have had it for just over a month. It came with a one month free trial of Netgear Armor. I'd been getting emails for the last ...
ErzakAZ
Feb 14, 2026 Place Cable Modems & Gateways
not listed
113Views
0likes
7Comments
Understanding how CAX80 works
I have this with xfinity internet. I have the two wifi networks set up, 2.4 & 5. The router/modem is in one end of the house. I can get a wifi signal on my TV in my bedroom through ROKU that is lo...
MChang1
Feb 14, 2026 Place Cable Modems & Gateways
cax80
59Views
0likes
3Comments
CM3000 and only 1 & 2 are lit in the front panel
I found a CM3000 in the e-waste pile and wanted to know if it's possible to have it fixed rather than e-wasted. The front panel has no sign of power other than the numbers 1 & 2 lit up solid white.
Solved
ibuyufo
Jan 21, 2026 Place Cable Modems & Gateways
cm3000
313Views
0likes
5Comments
CAX80 Poor Cable Connection
I have a CAX80 with Spectrum internet, and I noted that the Cable Connection indicates a "Poor" Status and and downstream status indicates 11.0dBmV which appears to on the high side of the recommende...
tequekama
Jan 15, 2026 Place Cable Modems & Gateways
not listed
462Views
0likes
2Comments
CM1100 won't connect to routers
I have a CM1100 that started having issues today. It will not connect to my router. It will, however, connect directly to a laptop. My setup is: ISP -> CM1100 -> Router/Firewall -> APs & Swit...
Xerloq
Jan 14, 2026 Place Cable Modems & Gateways
cm1100
499Views
0likes
8Comments
DISABLE AP ISOLATION ON CM3000
Since I started using this modem, many of my devices are not happy. SharkRF M!ke for example. I can not access shark rf link. I am told must disable AP Isolation, howver that is not an option ...
Gypsyjon
Jan 13, 2026 Place Cable Modems & Gateways
cm3000
796Views
0likes
17Comments