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Forum Discussion
Docis 3.1 Netgear Modem Randomly Drops Connection
Hi there,
I have a NetGear CM1000v2 with firmware V10.01.07. This past week the modem has been dropping the coax cable line repeatedly and is starting to get annoying. We had this modem for about 2 yrs 1 month and I don't know what the cause for these sudden drops in the connection to the internet.
Our ISP is Xfinity (Comcast) where I live. The modem can connect all 32 download channel bonds and 5 upload channel bonds and that's not a problem with how many it can connect. But when it has a problem when keeping the connection stable, the first sign I usually see is if the upstream channels are no longer in a locked status before the download channels usually do go out.
The modem is located in the living room. The coax cable line comes directly from the basement, that line is then connected to a 1:1 connector to the living room, on the living room there is that wall plate connector followed by a 2:1 splitter. 1 for the modem and the other for the TV box.
Does anyone have any ideas? I have done the reboot through the getaway connection and done a power cycle but seems to have no effect. if I ask Xfinity, there first thing they want to do is get someone to the house, which won't solve anything.
The picture below is when a notice that it is in the process of losing its upload channel bonds where the modem is trying to re-lock or it can lose all the download channel bonds.
4 Replies
You didn't include all your channels from from the ones you did, you have line issues.
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.If you can, include the full cable connections page and the event logs from after checking the lines highlighted above.
Well it did it again 2 times so far. Here is a list of the download and upload channels
As for the coax line, I have check all the cord and there is no kinks, damage, or moisture anywhere that I can tell. But as for the outside, this line has been like this for maybe 4 years ish and this line has been connected since the house was built.
The only other thing here is the splitter but this splitter was bought from Best Buy about a year ago when troubles happened with random connection drops.
Here is also the log
Try disconnecting the splitter.
Your upstream levels are high meaning the router is having to increase its output power just to communicate with the cmts. You also have range window violations which are power levels that are going outside of parameters.
Try to connect right where it comes into the home and not with any splitters or adding extra cabling to the line.
