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CM1150V dramatic slowdown, please help!
Two weeks ago I upgraded to Xfinity gigabit speed from 400Mbps, and for about a week I was getting speeds of 700-750Mbps. Around a week ago, I began to have disconnects where I would lose my Internet connection completely this was happening every day or every other day. Each time this happened I would unplug the CM1150v and the router (R7000), wait 5-7 minutes and then plug them back in and within a few minutes I’d be back online. Two days ago I had another disconnect and after I got the modem and router back I noticed my speeds had dropped dramatically to where I can only get 100-120Mbps.
I’ve tried:
Resetting the modem and router (unplugging them and plugging back in) dozens of times.
I’ve been on the phone with at least six different Comcast techs, each one would remotely reboot the cable modem and confirm that it’s being reprovisioned and being sent the correct bootfile for my speed tier (1000 Mpbs). I can also confirm the both the router and cable modem have very good airflow (ruling out any possibility of overheating).
The CM1150v firmware is 2.02.04 and I bought it in February of this year.
The R7000 firmware has been 1.0.9.88 and 1.0.9.42 (I was on 88, but I rolled back to 42 just in case that was the reason for the slowdown)
Please help, I have no idea what do at this point. Comcast has given up as well. They keep recommending I call Netgear support, but they are too expensive.
The .42 has been the most stable. However, once you update the firmware, you need to reset the router if you downgrade to the .42. That's had the best results for fixing issues with the R7000
10 Replies
First is to find out if its a modem or router issue.
1. hardwire your computer directly into the modem. what speeds do you get. If its still slow, its a modem/line problem.
2. If the modem pulls full speeds, then its a router problem and we need to work on that.
A screen shot of your connections page from the cm1150v will help. Make sure to get all of the screen so we know upload/download connections.
A screen snip of the logs can help too. Post them as a link as the mods have to approve pictures that are posted.
First, thanks for taking the time to help out, I very much appreciate it.
Ok, so I guess it's not my Cable Modem, I did a direct connection Computer to Modem, and got 905Mbps/41Mbps (download/upload)
I assume it's the router then?
Anyway here are the screen shots of my CM1150v Connections page and of Speednet (my computer direct to the CM)
https://photos.app.goo.gl/fUjgu21Ns9u2JPtn7
Question is, what's the best way to troubleshoot the Router (R7000) Firmware 1.0.9.42 ?
FYI, I was have the same slowdown issue with the latest firmware (1.0.9.88)
It would be the router.
The R7000 is a semi-older generation router. It may not support 900Mbps on the WAN to LAN which needs NAT hardware accelleration or Cut-Through technology support to achive those speeds. You may need a more newer generation router. The R7800 I have supports 900Mbps on the WAN to LAN. I presume most models after this and the newer RAX series do this as well. The XR450/500 gaming routers also support 900Mbps.
Try a factory reset on the R7000 and setup from scratch. Be sure to not enable any QoS, Traffic meter or Acess controls. With 1 wired PC connected to the router, speed test after the setup completes. Be sure no wiress devices are connected here as well.
If the speed doesn't go up, then the router is probably not supportive of near 900Mbp speeds.
If you have a Gb LAN switch and two wired Windows PC you can test your R7000 out for youself using this tool:
https://www.duckware.com/tech/router-wan-to-lan-throughput-test.html
Have the ISP check the singal line quality up to the modem.
Be sure there are no coax cable line splitters in between the ISP service box and the modem.
Slatham wrote:Two weeks ago I upgraded to Xfinity gigabit speed from 400Mbps, and for about a week I was getting speeds of 700-750Mbps. Around a week ago, I began to have disconnects where I would lose my Internet connection completely this was happening every day or every other day. Each time this happened I would unplug the CM1150v and the router (R7000), wait 5-7 minutes and then plug them back in and within a few minutes I’d be back online. Two days ago I had another disconnect and after I got the modem and router back I noticed my speeds had dropped dramatically to where I can only get 100-120Mbps.
I’ve tried:
Resetting the modem and router (unplugging them and plugging back in) dozens of times.
I’ve been on the phone with at least six different Comcast techs, each one would remotely reboot the cable modem and confirm that it’s being reprovisioned and being sent the correct bootfile for my speed tier (1000 Mpbs). I can also confirm the both the router and cable modem have very good airflow (ruling out any possibility of overheating).
The CM1150v firmware is 2.02.04 and I bought it in February of this year.
The R7000 firmware has been 1.0.9.88 and 1.0.9.42 (I was on 88, but I rolled back to 42 just in case that was the reason for the slowdown)
Please help, I have no idea what do at this point. Comcast has given up as well. They keep recommending I call Netgear support, but they are too expensive.
