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Your downstream looks great, your upstream power looks to be on the lower end. For reference: Lower than 35dBmv is where major issues happen. Lower than 38dBmv is where possible packet loss/instability happens. Higher than 53dBmv possible packet loss/instability. Higher than 57dBmv major issues. Ideal upstream power is between 45-50dBmv. Ideal downstream power is between -8dBmv and +8dBmv (closer to 0 is better). Ideal for downstream SNR is anything above 30dB (best ~40-45dB) Without getting too technical... The upstream power is controlled by Comcast's equipment when negotiating with your modem. However, if there is a lot of noise on the line, you can get issues at lower upstream levels. Congested nodes will likely want client modems to be talking quieter, to reduce overall noise, which may be why your power is on the low end. You could call comcast support and have a tech come and diagnose the line. Tell them you are experiencing lag/stuttering when playing games, or the like. They may also remotely adjust your upstream power. You could also try (but don't hold your breath) adding a coax splitter between the wall and modem to "trick" it to negotiate a higher upstream power, it will also negatively affect your downstream levels. Good thing is that your downstream power is excellent, so you have a bit of wiggle room there. The best fix would be that Comcast increases your modem's upstream power (whether it be by power adjustments, line repair, or node repair). Personally, I would add the splitter, check signal levels ~15-30min after modem boot, if all levels within spec, then monitor signal levels/quality over several days. If signal levels are way off, check again in another 15min, if still bad then remove splitter and call comcast.

On that note, you would need to refresh the display of your signal levels periodically to get a better picture of them changing since it's only a snapshot of "right now". For example, during peak periods they may be too low and you need an amp. Or during peak periods they are normal, but off-peak they are too high. For that you would just have to add a splitter to attenuate the signal a little bit.

Comcast/consumer routers are typically simplistic in configurations. Not much you can do wrong, lol. Basically plug-n-play. I would suspect that your cable signal levels are off somehow. On either upstream and/or downstream too high or too low power levels can have adverse effects on your connection quality. You may be able to get speed, but have issues with stability or packet loss. This is something I have dealt with in the past. If you're able, take a screenshot of your modem's cable signal levels and post here. Should look similar to the attached image. Should be able to access the admin web page by navigating to "http://<your gateway address>" (ex: http://192.168.1.1 ). user/password will be on the modem's info label (same place as your default wi-fi password).

xfinity has most of it all adjustable through their app which isnt much

look at their modem dashboard to see settings

the xfinity gateway modems auto update firmware in middle of the night. i think its iPv6

Nycz check your ISP IP's address that are close to you, first took at NIC IP address or have tried ipconfig or tracert command in DOS then you see where is coming from

that you think is PC, Mac, Smart Phone are ? Rugger is a sound board for games indy Q can you tell NSA return my toothbrush and toothpaste for are missing

i get 40 upload. i wish i could get the same up as down like some people do but i dont know how they get that.

Rugger runs the servers as an NSA honeypot to try to lure KaptCrunch in... He's gonna get him one day

thank you all. got it taken care of!

Happy Birthday and have a great day

Happy Birthday.

Comcast the upload sucks...

Happy Birthday!

don't argue , with mate, just dicker Gentlemen love/hate relationship

XtremeIdiots would like to wish all members celebrating their birthday today a happy birthday. Bushape (67)timinator (52)

have tried network monitoring software to see whats going on