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Forum Discussion
CM2000 Slow Download/Upload Speeds
I recently purchased a CM2000 to replace the equipment that I was leasing from Suddenlink. The modem that they provided was testing at 900Mbps down/40Mbps up but this Nighthawk is only testing at 21.2Mbps down/2Mbps up using the same lines. The upstream SNR values seem a tad bit high for the downstream power readings but I think it's still within spec. Besides, the other modem wasn't having this issue.
The one thing that seems odd are the event logs that are generated when the device is power cycled.
| Mon Jun 20 23:09:31 2022 | (Error (4)) | Primary address failed, secondary active;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1; |
| Mon Jun 20 23:09:31 2022 | (Warning (5)) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1; |
| Mon Jun 20 23:09:28 2022 | (Critical (3)) | DHCP failed - RS sent, no RA received;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1; |
| Mon Jun 20 23:09:12 2022 | (Notice (6)) | Honoring MDD; IP provisioning mode = APM |
| Mon Jun 20 23:09:00 2022 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
It doesn't appear that the device is falling back to 3.0 but that's really just a gut feeling more than anything else. It's entirely possible that it is a provisioning problem so I figured I ask the community to see what y'all think. Note that the modem is connected to my PC via ethernet at the moment.
Thoughts?
14 Replies
Do you have a screen snip of the cable connections page?
are you connecting through a router or directly to the modem?
This is the first time correctables/uncorrectables has been above 0. I just tried the other modem again as well and it is still pulling top speeds while this netgear is only pulling 20-22Mbps down.
You have a lot of errors in the line.
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, bad/old/cheap connectors, or corroded connections. Replace them if you do.
If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.
