Forum Discussion

Star

Jan 08, 2024

Solved

CAX 30 and XFinity Upload Speed

i have a cax 30 and my xfinity service is 1gb download, 100mb upload. i get somewhere between 500 and 800mb download (which i guess is okay) BUT my upload speed is stuck around 25mb (which is not...

Kitsap
Jan 11, 2024
jim-hanson wrote:
okay so . . .
1. i can't get nextgen service at this time regardless of my modem.
2. even if i did have nextgen service, my cax30 is not yet capable of that (even though it is a recommended device)

correct?

Your specific service address has not yet been updated to receive the Xfinity Next Gen service. Work in progress across the Xfinity service areas.

Your CAX30 does not have the updated firmware necessary to allow it to connect to the Xfinity Next Gen network. The list of devices approved for Next Gen network connection is updated by Xfinity every month or so.

Yes, correct.

jim-hanson

Star

Jan 11, 2024

here is the connection status.

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	531000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+
IP Provisioning Mode	Honor MDD	IPv6 only

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectabables
1	Locked	256 QAM	20	531000000 Hz	-2.1 dBmV	45.0 dB	0	0
2	Locked	256 QAM	13	489000000 Hz	-1.0 dBmV	45.7 dB	0	0
3	Locked	256 QAM	14	495000000 Hz	-1.4 dBmV	45.5 dB	0	0
4	Locked	256 QAM	15	501000000 Hz	-1.7 dBmV	45.4 dB	0	0
5	Locked	256 QAM	16	507000000 Hz	-1.5 dBmV	45.3 dB	0	0
6	Locked	256 QAM	17	513000000 Hz	0.9 dBmV	45.7 dB	29	0
7	Locked	256 QAM	18	519000000 Hz	0.9 dBmV	45.7 dB	10	24
8	Locked	256 QAM	19	525000000 Hz	-1.5 dBmV	45.3 dB	6	29
9	Locked	256 QAM	21	537000000 Hz	-1.9 dBmV	45.0 dB	0	0
10	Locked	256 QAM	22	543000000 Hz	-1.4 dBmV	45.3 dB	0	0
11	Locked	256 QAM	23	549000000 Hz	-1.3 dBmV	45.3 dB	0	0
12	Locked	256 QAM	24	555000000 Hz	-1.9 dBmV	44.8 dB	0	0
13	Locked	256 QAM	25	561000000 Hz	-2.4 dBmV	44.5 dB	0	0
14	Locked	256 QAM	26	567000000 Hz	-2.5 dBmV	44.4 dB	0	0
15	Locked	256 QAM	27	573000000 Hz	-1.8 dBmV	44.7 dB	11	24
16	Locked	256 QAM	28	579000000 Hz	-1.2 dBmV	45.1 dB	11	26
17	Locked	256 QAM	29	585000000 Hz	-1.3 dBmV	44.7 dB	10	27
18	Locked	256 QAM	30	591000000 Hz	-1.7 dBmV	43.8 dB	14	21
19	Locked	256 QAM	31	597000000 Hz	-1.9 dBmV	43.9 dB	6	31
20	Locked	256 QAM	32	603000000 Hz	-1.8 dBmV	44.4 dB	7	30
21	Locked	256 QAM	33	609000000 Hz	-1.6 dBmV	44.6 dB	8	27
22	Locked	256 QAM	34	615000000 Hz	-1.7 dBmV	44.7 dB	0	0
23	Locked	256 QAM	35	621000000 Hz	-2.0 dBmV	44.3 dB	6	29
24	Locked	256 QAM	36	627000000 Hz	-2.2 dBmV	43.0 dB	12	21
25	Locked	256 QAM	37	633000000 Hz	-1.9 dBmV	42.6 dB	0	0
26	Locked	256 QAM	38	639000000 Hz	-1.4 dBmV	43.5 dB	0	0
27	Locked	256 QAM	39	645000000 Hz	-1.3 dBmV	44.7 dB	0	0
28	Locked	256 QAM	40	651000000 Hz	-1.7 dBmV	44.5 dB	0	0
29	Locked	256 QAM	41	657000000 Hz	-2.2 dBmV	44.3 dB	0	0
30	Locked	256 QAM	42	663000000 Hz	-1.7 dBmV	44.5 dB	0	0
31	Locked	256 QAM	43	669000000 Hz	-1.2 dBmV	44.8 dB	0	0
32	Locked	256 QAM	44	675000000 Hz	-1.4 dBmV	43.2 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	1	5120 Ksym/sec	16400000 Hz	52.8 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	22800000 Hz	52.8 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	29200000 Hz	52.8 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	35600000 Hz	53.0 dBmV
5	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
6	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
7	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV
8	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0 dBmV

Downstream OFDM Channels

Channel	Channel ID	Frequency	Power	SNR/MER	Active Subcarrier Number Range	Total Codewords	Uncorrectable Codewords
1	193	957000000 Hz	-2.8 dBmV	42.4 dB	148 ~ 3947	2586903	0
2	0	0 Hz	0 dBmV	0 dB	0 ~ 0	0	0

Upstream OFDMA Channels

Channel	UpstreamIsMuted	Ranging Status	Subcarrier Zero Frequency	Active Subcarrier Number Range	Symbols Per Frame	Tx Power
1		Other	0 MHz	0 ~ 0	0	0 dBmV
2		Other	0 MHz	0 ~ 0	0	0 dBmV

Extended Upstream Transmit Power

[ ]Enable Extended Upstream Transmit Power

Current System Time: 2024-01-10 21:40:26

System Up Time: 00:13:55

jim-hanson

Star

Jan 11, 2024

and i reset up the modem--reboot, redo through xfinity app, after firmware version. reboot again.

did not factory reset.

FURRYe38
Guru - Experienced User
Jan 11, 2024
Looking at your logs, we see some correctables and un-correctables that should be mostly zeros but not too bad.

Power levels are with in specs.

Ya, no OFDMA signal. Something to ask the ISP about.

Also the event log is loaded with Critcials. Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.

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.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
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-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

FYI, since the CAX30 only has 1Gb supporting LAN ports, the CAX30 may only be deemed supporting of 1Gb ISP speeds or lower. CC and XF split there ISP services a couple of years ago into a 800Mbps and 1.2Gb service and discontinued there actual 1Gb service in various areas. So best recommendation is to ask the ISP about there 800Mpbs service for now, if there not supporting of the actual 1Gb service. The CAX30 would not be supportive of anything beyond that.

jim-hanson wrote:

and i reset up the modem--reboot, redo through xfinity app, after firmware version. reboot again.

did not factory reset.
- jim-hanson
  Star
  Jan 11, 2024
  i did have a splitter and got rid of that. the cable i am using is from comcast/xfinity and to me seems fine. same speeds.
  
  i'll check on the errors to see if that has stopped now.
  - FURRYe38
    Guru - Experienced User
    Jan 11, 2024
    Post up another set of cable connections and event logs so we can check.
    
    Check with the ISP to see if the 1Gb package is being offered, if so, then the CAX30 will work. I know mine does, however I'm not on XF ISP.
    
    jim-hanson wrote:
    
    i did have a splitter and got rid of that. the cable i am using is from comcast/xfinity and to me seems fine. same speeds.
    
    i'll check on the errors to see if that has stopped now.