NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.

Forum Discussion

donawalt's avatar
donawalt
Mentor - Experienced User
Dec 12, 2022
Solved

Procedure for replacing my modem?

Is there a procedure for replacing a cable modem that is used with a Orbi RBR850 system? I am replacing a CM1200 with a CM2000. I am assuming something like this:   1. Power off RBR850 2. Disconne...
  • donawalt's avatar
    donawalt
    Dec 13, 2022

    The update/activation is complete, I have moved from a Netgear CM1200 modem to a CM2000 modem. Everything is resolved and working well, but there were some interesting moments in the process:

     

    • The biggest is after the activation and everything was back up, I noticed the RBR850 router had its DHCP address pool changed from 192.1.168.1->150 to 172.16.x.x! This caused havoc – some devices got a new DHCP, some did not. I ended up restoring my backup.cfg file and got the router back to the proper 192.168.1.x address pool and router address.
    • Speeds are fine – although my iPhone 14 Pro, which has WiFi 6, seems faster. Before it tested around 780/39 when about 6 feet from the router; after, it is 934/41. Directly connected Ethernet computers like my Mac are about the same, 925/40.
    • I have two things to upgrade for the full experience – I have a Cat6 cable from modem to RBR850, FURRYe38 recommends Cat6A. Second, my switch is a GS348 NETGEAR 48-Port Gigabit Ethernet Unmanaged Switch, which I am pretty sure does not support 2.5Gbps, which is why direct connect/Eth speeds are the same.
    • When the new modem was activated, I went from 4 ATDMA Bonded Upstream Channels to 5! Was that because the new modem could handle it or some other reason?
    • To have access/internet capability, I had to power cycle 3 of my 6 smart plugs, 1 Apple TV, 1 iPhone, and 1 of 3 HP printers – likely due to the issues cited in #1.

     

    Food for thought!