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Forum Discussion
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.
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.