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CM1000 Xfinity issues
I am quite frustrated at this point. I had a CM600 modem to support Comcast's Extreme 150 service. I've had it for a few years and was consistently getting 160 to 170mbps speed from it. About thre...
Well it is finally fixed. The tech showed up today and I showed him the two frequencies that were having the problem. He checked outside, and then at the tap. He came into the house and said he needed to call a bucket truck in to fix it. I got a recorded call from Comcast that they were working to fix the issue. I got a second call an hour later that the issue was fixed. I ran a speed test and got a consistent 160mbps (yay!). I used the reset button on the modem and let it re-provision. All the signal/noise and power levels were good and there were no uncorrectable codewords. They didn't tell me what they fixed, but at long last, it is fixed.
power levels are still bad (though I dont see uncorrectables and that may be because you did not the run traffic for a while).
what is the your power level at the coax entry point in your home?
Have you tried using active return path? (these are tricky as some of them distort signal and even make it worse).
Have you tried asking to remove attenuation outside your house so you can boost your signal level? (typically at the node at the street).
Power levels are "bad" => What are examples of good and bad power levels? Please writeup some docs on how to self-diagnose this stuff, would be useful. What are bad levels of errors? What do the specific error messages mean in the log, etc..
- Can anyone explain this? Comcast came out today and hooked up their XB6 modem and poof worked fine. I was watching YouTube last night and the internet just cut out immediately and haven’t been able to fix it. The modem downstream and upstream lights both turn solid then the internet blinks. It seems to time out then repeat this process over and over. Comcast says the modem is bad. The modem is less than two weeks old. This is very frustrating because nobody seems to know what’s going on and I don’t want to pay Comcast $10 a month. Firmware is update also. When I go into the log files they all just say dhcp failed or synchronization failure.
If anyone has an idea what’s happening that would be great. - Correct. Comcast can’t even see the modem is online so they can’t even troubleshoot it. It was working fine until yesterday afternoon when it abruptly stopped.
DHCPv6 server from comcast is not responding (have seen this happening when there was an outage in an area).
how long have you seen this? or it just started happening.
where are you located?
- It just started yesterday around 2pm cst. Located in St. Paul, Minnesota. They hooked up their own modem and that works fine. I just don’t want to get stuck paying them $10/ month to rent a modem. So it doesn’t appear to be an outage issue.
