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CM700 time mismatch and login issues
I have been having trouble logging into the GUI for my modem. Lots of page not found and one "unsupported protocol" error. I read about that and it says a time discrepancy could be the cause. I have been able to get in intermittently and I see that the time stamps on the event logs are an hour off from PC and real time. Like it didn't adjust for DST. I also can't find a place in there to set the time. Any help??
Well, it looks like it was that butt connector... or perhaps just needing to also clean and tighten the ISP side.
First, I connected the ISP cable directly to the modem outside and plugged the ethernet into a laptop. Accessed the GUI and correctables and uncorrectables were 0. So, I installed a fresh new splitter out there to the cable that runs to the network closet and tested similarly in there and success, errors still 0, so my cable is good. Phew.
So, I then reconnected CM700 modem output ethernet to the router to restore my network and everything is working... EXCEPT I can no longer log onto the modem GUI to check or monitor this going forward. On any device, wired or wifi. On any browser. I just get "can't reach page, took too long to respond" errors. Just like it had been for weeks lately until somehow miraculously I started being able to logon this morning. But that is just gone again? I really don't understand what is blocking me from reaching the modem admin GUI.
16 Replies
There is no time settings on CM series modems.
What browser are you using? Try MS Edge, Firefox or Opera.
If you can get logged in to the CM modem with a wired PC, Please post a copy and paste of the modems connection status page.
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.
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?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.htmlI seem to be able to mostly log on today without too many issues wifi and wired PCs. For the last week I could get in very rarely. Only today on Edge browser I get unsupported protocol. No issues on Chrome. Powers and SNR all within spec. Status shows good.
I am doing this because I have been getting some connectivity issues and dropouts. The CM700 event log showed some "critical" errors, T3 errors.
There is one butt connector between the Xfinity service cable and a cable I have run to my closet where the modem sits and feeds my Linksys 3200ACM router. Can't eliminate that butt connector. In the interim I have cleaned and tightened those connections and reset the event log. Nothing so far.
Here is the connection and channel info. BTW, I just got another T3 timeout error in the log.
