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Ethernet vs WIFI : funny IP addresses

Discussion in 'ASUS Wireless' started by Mathieu, Jan 6, 2018.

  1. Mathieu

    Mathieu Occasional Visitor

    Joined:
    Mar 29, 2015
    Messages:
    25
    Hello everybody
    1. I have noticed that certain devices on my home network, when plugged into a LAN port (either directly in the router or in a TP link switch) are getting an IP address outside of the boundaries of the DHCP pool: eg 10.x.x.x vs 192.z.z.z.
    What could be causing it?

    2. The above devices, when connected via WiFi, are behaving as expected. I also notice that for some of these, when plugged by cable, both the wifi and ethernet interfaces are showing in the network map, with the same IP address but a distinct MAC. Only one MAC was used for the DHCP reservation...
    Is there a way to tell the router to ignore one when the other is active, as I suspect a duplicated IP address would do no good to my setup?

    Thanks for your help, and happy epiphany (as applicable).
     
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  3. RMerlin

    RMerlin Super Moderator

    Joined:
    Apr 14, 2012
    Messages:
    27,249
    Location:
    Canada
    You have another device on your LAN that runs a DHCP server. You will have to track it and shut it down.
     
    Mathieu likes this.
  4. Mathieu

    Mathieu Occasional Visitor

    Joined:
    Mar 29, 2015
    Messages:
    25
    Thank you for the lead.
    Will go hunting for the rogue server now.
     
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