Time to Replace CM1100?

[illzoni]

Xfinity tells me my modem, CM1100, is 3 years old and is causing connection issues with my internet service.  Does this seem accurate?

DOCSIS® 3.1 Cable Modem (CM1100) 

[FURRYe38]

No. Someone at the ISP is trying to get you to spend money elsewhere. 

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...

Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended. 
What is the brand and model of the host wifi router connected to the modem?

[illzoni]

Thanks for helping.

It's connected to a Netgear Nighthawk Mesh SiFi 6 Router (MR60).

[illzoni]

I'm trying to post the copy/past, but the forum won't let me.

[illzoni]

Apply             Cancel

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

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<tabindex=-1>Startup Procedure</tabindex=-1>

Procedure	Status	Comment
Acquire Downstream Channel	543000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enable	BPI+
IP Provisioning Mode	Honor MDD	IPv6 only

[illzoni]

<tabindex=-1>Upstream Bonded Channels</tabindex=-1>

Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 17 16400000 Hz 44.8 dBmV 2 Locked ATDMA 18 22800000 Hz 45.0 dBmV 3 Locked ATDMA 19 29200000 Hz 47.3 dBmV 4 Locked ATDMA 20 35600000 Hz 45.8 dBmV 5 Not Locked Unknown 0 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Hz 0.0 dBmV

<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

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, 3 193 957000000 Hz -6.3 dBmV 35.3 dB 148 ~ 3947 60266017 50668788 3 2 Not Locked 0 0 0 Hz 4.8 dBmV 0.0 dB 0 ~ 4095 0 0 0

<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>

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

Current System Time: Wed Nov 01 15:57:15 2023

System Up Time: 0:55:30

[illzoni]

Ok, I think I was able to post what was requested.

Looking forward to sorting this out.

Thanks!

[FURRYe38]

Please post the entire data on the connections page along with the data from the events log page. 

You can copy and paste into a word doc then export to PDF file than attach to your next post if that helps. 

[illzoni]

Here's the connection info.

[illzoni]

And the event log.

[FURRYe38]

Power levels are good. 

I see lots of correctable codewords on the one OFDMA channel at the bottom that I believe should be mostly zero. Something the ISP should look at.

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.

Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended. 
What is the brand and model of the host wifi router connected 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-Mod...
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/

[illzoni]

When Xfinity does a check of the modem, can they see this data?

Or do I need to provide it to them?

[FURRYe38]

They should or send it to them.