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SeaDude's avatar
SeaDude
Aspirant
Nov 25, 2017

C6300 Assigning an IP that is not in range?

Why is the guest network dhcp assigning devices to a subnet I can't control? When devices connect to my network, even my guest network, I want to define an IP range and other paramenters. My 2.4/5Ghz networks both share 192.168.0.x network but my guest network runs at 192.168.251.x.

 

Where is the C6300 assigning this address range from?

address range
c6300
Troubleshooting

3 Replies

  • antinode's avatar
    antinode
    Guru
    Nov 25, 2017

       Firmware version?

     

    > Why is the guest network dhcp assigning devices to a subnet I can't
    > control?

       The easiest explanation would be that you're connecting to someone
    else's guest network.  As usual, many things are possible, but I would

    not expect the (one) Netgear DHCP server to be clever enough to be able

    to dispense addresses from more than one subnet.

    • SeaDude's avatar
      SeaDude
      Aspirant
      Nov 27, 2017

      Firmware v2.01.22.

       

      I'm connecting to my own guest SSID. Not sure how this router is assigned a random subnet. Dont' like it.

       

      • antinode's avatar
        antinode
        Guru
        Nov 27, 2017

        > I'm connecting to my own guest SSID. Not sure how this router is
        > assigned a random subnet. Dont' like it.

           Another possible explanation would be that some other device on your
        LAN (possibly another wireless guest device) is running a DHCP server,
        independent of your router, and your guest devices are getting their
        addresses from it.

           Some Internet-of-Junk gizmos which have not yet been configured
        properly will run their own little networks, including a DHCP server, to
        make it possible to configure them by connecting directly to them using
        a computer/phone/tablet.  If one of those goes berserk, then its DHCP
        server could be supplying these foreign addresses.

           If you can't find any other devices to blame, then you might resort
        to the usual panacea, a full ("factory") reset, and then
        reconfiguration.  You can try saving and restoring the settings, but if
        they're corrupt, then a manual reconfiguration might work better.

        > [...] I would not expect the (one) Netgear DHCP server to be clever
        > enough to be able to dispense addresses from more than one subnet.

           Still true, but, as usual, many things are possible.