I have the same issue; xFi gigabit router - both my work laptop and home PC are plugged directly into the router - but intermittently and without any rhyme or reason both will drop internet (at the same time) - this is especially noticable on my laptop as its connected via VPN and everytime the reset occurs, the VPN connection resets (dropping my work). On my home PC I notice it when playing a client/server game like World of Warcraft, where suddenly the game loses connection and I have to reconnect.
I've restarted the modem, run Comcast diagnostics and everything is OK per their automated system. But this has been plaguing me for a while now.
Post the requested info from here;
There is no other router present besides the xFi router.
Here is my router version:
Hardware Revision: 2.2
No system or event logs will display when selected in the admin page (page is blank), so I cannot provide those. This xFi router type has no lights (except the power light) so the status of those cannot be provided. This router admin page displays the downstream/upstream in a horizontal frame, so there's no way to list it out in one picture. I converted it into a vertical listing for downstream:
|Lock Status||Frequency||SNR||Power Level||Modulation|
|29||Locked||673 MHz||40.0 dB||1.6 dBmV||256 QAM|
|1||Locked||505 MHz||41.9 dB||0.1 dBmV||256 QAM|
|2||Locked||511 MHz||41.5 dB||-1.0 dBmV||256 QAM|
|3||Locked||517 MHz||41.2 dB||-1.3 dBmV||256 QAM|
|4||Locked||523 MHz||40.8 dB||-1.8 dBmV||256 QAM|
|5||Locked||529 MHz||41.0 dB||-1.3 dBmV||256 QAM|
|6||Locked||535 MHz||41.3 dB||0.8 dBmV||256 QAM|
|7||Locked||541 MHz||41.4 dB||0.1 dBmV||256 QAM|
|8||Locked||547 MHz||41.4 dB||0.7 dBmV||256 QAM|
|9||Locked||553 MHz||41.0 dB||0.9 dBmV||256 QAM|
|10||Locked||559 MHz||40.3 dB||0.8 dBmV||256 QAM|
|11||Locked||565 MHz||40.1 dB||0.4 dBmV||256 QAM|
|12||Locked||571 MHz||41.1 dB||0.5 dBmV||256 QAM|
|13||Locked||577 MHz||41.3 dB||0.9 dBmV||256 QAM|
|14||Locked||583 MHz||41.4 dB||0.8 dBmV||256 QAM|
|15||Locked||589 MHz||41.6 dB||1.2 dBmV||256 QAM|
|16||Locked||595 MHz||41.5 dB||0.8 dBmV||256 QAM|
|17||Locked||601 MHz||41.8 dB||1.5 dBmV||256 QAM|
|18||Locked||607 MHz||41.8 dB||1.6 dBmV||256 QAM|
|19||Locked||613 MHz||41.6 dB||2.1 dBmV||256 QAM|
|20||Locked||619 MHz||41.4 dB||2.2 dBmV||256 QAM|
|21||Locked||625 MHz||41.0 dB||2.3 dBmV||256 QAM|
|22||Locked||631 MHz||40.9 dB||2.2 dBmV||256 QAM|
|23||Locked||637 MHz||40.7 dB||1.8 dBmV||256 QAM|
|24||Locked||643 MHz||40.9 dB||1.9 dBmV||256 QAM|
|25||Locked||649 MHz||40.9 dB||2.1 dBmV||256 QAM|
|26||Locked||655 MHz||40.8 dB||1.8 dBmV||256 QAM|
|27||Locked||661 MHz||40.7 dB||1.9 dBmV||256 QAM|
|28||Locked||667 MHz||40.8 dB||1.6 dBmV||256 QAM|
|30||Locked||679 MHz||40.7 dB||1.3 dBmV||256 QAM|
|31||Locked||685 MHz||40.7 dB||1.7 dBmV||256 QAM|
|32||Locked||691 MHz||40.6 dB||1.4 dBmV||256 QAM|
|159||Locked||701 MHz||38.0 dB||3.2 dBmV||OFDM|
|Channel Bonding Value|
Post the requested info from here;
Well the signal stats looked good at that snapshot in time but it's tough trying to advise further here without seeing the error log entries. We've seen other posts here recently indicating that they may have decided to disable their display through a recent firmware update.... If so, that's too bad....
That being said, perhaps there is noise ingress into the line(s) somewhere.
There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. They can check the CMTS (Cable Modem Termination System) for any real time degradation and / or error reports, see your node / cable plant and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and poll for those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
Hi jcin617m, thank you for reaching out on our forums and for proving all the information above. I would like to help review signals further on my side, could you please send me a private message with your full name to begin?