CAX80 connected but no internet Xfinity

Question

I just recieved the CAX80 yesterday and called Xfiinity to get it hooked up. It's online but I can't connect to the internet. Xfinity confirmed that it is working on their end. My phone shows that it is connected to wi-fi 6 and has good connection but there is no internet. How can I get this to work? I'm about to return it.

FURRYe38 · Answer

Does a wired PC connected to the modems back ports work?

Try a factory reset and setup from scratch using a wired PC.

Be sure your mobile devices is setup for automatic IP addressing configuration. Not static on the mobile device.

Svalent · Answer

So I did the factory reset and then disconnected everything and plugged it in and hooked up an ethernet to my laptop. At first the internet still didn't work even though it was hard wired. I logged into the modem and was just going through the menus and then after about 5-10 minutes I tried the internet again and it was working. Youtube was working. So I logged in with my phone and wifi is now working on my phone. Here is a copy and paste of the cable log. Now I'm trying speed tests and I'm not impressed. On 5G on my phone it was a little over 100mbps download speed and each time I test it, it is getting less. I have the 1000mbps plan from Xfinity so I should be getting a lot better. I ran the speed test on my laptop and it is hard wired and download speede was 434. Then I tested again a few minutes later and it was 104. I just tried again and now I got 460. shouldn't I be getting at least double that? should I reset the modem again?

Frequency start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	447 MHz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	256 QAM	8	447000000 Hz	-2.0 dBmV	40.6 dB	0	0
2	Locked	256 QAM	9	453000000 Hz	-2.6 dBmV	40.5 dB	0	0
3	Locked	256 QAM	10	459000000 Hz	-2.4 dBmV	40.5 dB	0	0
4	Locked	256 QAM	11	465000000 Hz	-2.8 dBmV	40.3 dB	0	0
5	Locked	256 QAM	12	471000000 Hz	-3.0 dBmV	40.2 dB	0	0
6	Locked	256 QAM	13	477000000 Hz	-2.6 dBmV	40.3 dB	0	0
7	Locked	256 QAM	14	483000000 Hz	-2.5 dBmV	40.4 dB	0	0
8	Locked	256 QAM	15	489000000 Hz	-2.2 dBmV	40.5 dB	0	0
9	Locked	256 QAM	16	495000000 Hz	-1.6 dBmV	40.7 dB	0	0
10	Locked	256 QAM	17	507000000 Hz	-1.4 dBmV	40.8 dB	0	0
11	Locked	256 QAM	18	513000000 Hz	-1.4 dBmV	40.4 dB	0	0
12	Locked	256 QAM	19	519000000 Hz	-1.2 dBmV	40.5 dB	0	0
13	Locked	256 QAM	20	525000000 Hz	-1.0 dBmV	40.8 dB	0	0
14	Locked	256 QAM	21	531000000 Hz	-0.9 dBmV	40.8 dB	0	0
15	Locked	256 QAM	22	537000000 Hz	-1.1 dBmV	40.8 dB	0	0
16	Locked	256 QAM	23	543000000 Hz	-1.2 dBmV	40.6 dB	0	0
17	Locked	256 QAM	24	549000000 Hz	-0.9 dBmV	40.7 dB	0	0
18	Locked	256 QAM	25	555000000 Hz	-0.7 dBmV	40.8 dB	0	0
19	Locked	256 QAM	26	561000000 Hz	-0.8 dBmV	40.8 dB	0	0
20	Locked	256 QAM	27	567000000 Hz	-0.9 dBmV	40.8 dB	0	0
21	Locked	256 QAM	28	573000000 Hz	-1.0 dBmV	40.7 dB	0	0
22	Locked	256 QAM	29	579000000 Hz	-0.9 dBmV	40.6 dB	0	0
23	Locked	256 QAM	30	585000000 Hz	-0.4 dBmV	40.7 dB	0	0
24	Locked	256 QAM	31	591000000 Hz	0.0 dBmV	40.6 dB	0	0
25	Locked	256 QAM	32	597000000 Hz	0.1 dBmV	40.5 dB	0	0
26	Locked	256 QAM	33	603000000 Hz	0.1 dBmV	40.6 dB	0	0
27	Locked	256 QAM	34	609000000 Hz	-0.2 dBmV	40.4 dB	0	0
28	Locked	256 QAM	35	615000000 Hz	-0.3 dBmV	40.3 dB	0	0
29	Locked	256 QAM	36	621000000 Hz	0.0 dBmV	40.3 dB	0	0
30	Locked	256 QAM	37	627000000 Hz	0.0 dBmV	40.4 dB	0	0
31	Locked	256 QAM	38	633000000 Hz	0.0 dBmV	40.3 dB	0	0
32	Not Locked	Unknown	0	0 Hz	0.0 dBmV	0.0 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	4	5120 Ksym/sec	36700000 Hz	42.0 dBmV
2	Locked	ATDMA	1	5120 Ksym/sec	17300000 Hz	43.3 dBmV
3	Locked	ATDMA	2	5120 Ksym/sec	23700000 Hz	42.5 dBmV
4	Locked	ATDMA	3	5120 Ksym/sec	30300000 Hz	42.5 dBmV
5	Locked	ATDMA	5	1280 Ksym/sec	41200000 Hz	45.8 dBmV
6	Not Locked	Unknown	0	0	0	0.0 dBmV
7	Not Locked	Unknown	0	0	0	0.0 dBmV
8	Not Locked	Unknown	0	0	0	0.0 dBmV

Downstream OFDM Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0 ,1 ,2 ,3	48	850000000 Hz	-3.82 dBmV	39.4 dB	1108 ~ 2987	27482454	22121270	0
2	Not Locked	0	0	0 Hz	0 dBmV	0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	0	0	0 Hz	0 dBmV
2	Not Locked	0	0	0 Hz	0 dBmV

Extended Upstream Transmit PowerEnable Extended Upstream Transmit Power

Current System Time:Tue Nov 10 16:46:59 2020System Up Time:00:17:23

Svalent · Answer

I also tried connecting to the nighthawk app and can't do that either without an internet connection.

plemans · Answer

log into the cax80 through the browser. Get a screen snip of the cable connections page and the logs from the router.

that helps us to check the connection back to the isp.

also, try factory resetting it, (push and hold reset for 7-15 seconds while powered on). After it reboots, power it back off, unhook the coax and leave it for a minutes or 2. Then connect the coax back to it and boot it up, try reinstalling it.

If that doesn't help, post the screen snips of those logs and cable connections page.

did you call in for setup or use the autoactivation?

Svalent · Answer

How do i login through the browser? I'll try your factory reset idea. I called xfinity to get it setup and they activated it and said it was working. Then we hungup. I tried logging into wifi on my phone and it kept wanting me to sign into the comcast network. So i called them back and they said they had to turn on the internet and reset it. So it let me put in the network password after they did that and the modem was online and i was showing good connection. It just said there was no internet. They reset the modem from their office, i restarted my phone a couple times, they reset the network and none of it work. They suggested i get ahold of netgear tech support because xfinity is working fine on their end.

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CAX80 connected but no internet Xfinity

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