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CM1200 speed issue with Xfinity Gigabit service
Hello, I have gigabit service with Xfinity, and I did a speed test and pulled 950mbs, instead of renting the XB6 I purchased the CM1200, now my speeds are ~450MBps. I did not configurations on th...
No, for the CM1200, only LAN port 1 is to be used with a single NAT router behind it.
Lan ports 1 and 2 support Link aggregation which you need a LAG supporting router to beable to take advantage of this feature. R7960P or R8000P which support LAG.
The other ports 3 and 4 are for ISP static IP assigned addresses mostly seen in business class environtments.
So for basic home needs, if you don't have a LAG supporting router, disable LAG on the CM modem and connect your main host router to port #1 only and leave the others disconnected on the CM modem.
Hi,
Thank you for your response! I have a switch attached to port 1 of the CM1200, and another switch is attached to that switch, but all other ports on the modem are empty and all lights are green.I have tried a direct connection to the computer and modem, didn't help. I am not running wireless, only wired.
You need to move the switches OFF the modem and connected them behind a router.
I would reset the modem and setup from scratch with a NAT router connected at Port #1. Have a wired PC connected to the NAT router. Might need to reset the NAT router and setup from scratch.
I have this same modem, tested it for NG. Works well with my R7960P router, both in single port #1 and LAG modes.
Thank you for the feedback! What if I do not need a wireless router, any other recommended routers?
Thanks for your help. I see that ethernet port aggregation is disabled for the CM1200 and I have disaconnected the other LAN devices I had connected. I reset the ORBI and was able to connect it to the internet. I now have problems with the sattelites connecting to the ORBI. While I upgraded the the cable modem, my whole house connectivity is markedly worse.
Please post over in the Orbi forum and we'll help you out.
https://community.netgear.com/t5/Orbi/bd-p/Orbi
30 feet is recommended in between RBR and RBS to begin with depending upon building materials when wirelessly connected. https://kb.netgear.com/000036466/How-far-should-I-place-my-Orbi-satellite-from-my-Orbi-router
Good Luck.
Sleepdoc502 wrote:Thanks for your help. I see that ethernet port aggregation is disabled for the CM1200 and I have disaconnected the other LAN devices I had connected. I reset the ORBI and was able to connect it to the internet. I now have problems with the sattelites connecting to the ORBI. While I upgraded the the cable modem, my whole house connectivity is markedly worse.
I'm having a very similar situation. Here's my setup.
cm1200 Nighthawk cable modem
RAX200 Nighthawk router
When I connect my Xfinity cable modem I see speeds of 950Mbps speeds. But when I swap it out for the cm1200 I see my speeds drop to 500Mbps. Any thoughts on why this might be? I really really like the features of the RAX200 so was hoping to use it but with the drop in speeds I'm seeing I'm going to have to stick with the Xfinity modem unless I can figure out why.