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devdeep's avatar
devdeep
Guide
Aug 31, 2022

Double net and ip addresses allocation

I am confused by who allocates isp addresses. Connection is: ONT--> isp router--> my router ("X")

Isp router does not allow DHCP switch off and is necessary to connect my phone to it.

 

1. If I let the isp router handle ip addressing, to avoid resetting all devices on my current router (X), can I give the isp router the same SSID as X? X has ethernet wired switches - will the same name cause issues?

 

2. If I turn off WiFi in the isp router, presumably X will provide the ip addresses (as it is now). I can ignore other ethernet ports in the isp router so only address given by it is the X ip address.

 

3. In 2 above, any other double net issues I need to consider?

3 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru
    Aug 31, 2022
    devdeep wrote:

    I am confused by who allocates isp addresses. Connection is: ONT--> isp router--> my router ("X")

    Isp router does not allow DHCP switch off and is necessary to connect my phone to it.

     

    1. If I let the isp router handle ip addressing, to avoid resetting all devices on my current router (X), can I give the isp router the same SSID as X? No. X has ethernet wired switches - will the same name cause issues? Yes.

     

    2. If I turn off WiFi in the isp router, presumably X will provide the ip addresses (as it is now). I can ignore other ethernet ports in the isp router so only address given by it is the X ip address. Yes. 

     

    3. In 2 above, any other double net issues I need to consider? Use the ISP routers DMZ to help avoid double NAT issues or configure AP mode on the X router leaving the ISP router to handle all router duties.