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Title: ISC DHCPv4 assigned a new device on my network the same IP as one already static
Post by: frozen on December 01, 2025, 07:52:49 PM

Hi there, I have my cellphone assigned to 192.168.1.6 and it normally works fine

To my shock today I plugged in a new device for the first time, an Android TV device which uses DHCP as anything else to get an IP, and it apparently was given 192.168.1.6 as an IP address even though it's MAC address is completely unique and not even remotely similar by a single digit.

What is going on here? thanks!

Title: Re: ISC DHCPv4 assigned a new device on my network the same IP as an assigned device
Post by: Monviech (Cedrik) on December 01, 2025, 07:57:45 PM

https://docs.opnsense.org/manual/dhcp.html#reservations

A classic one. Easy to fix.

Title: Re: ISC DHCPv4 assigned a new device on my network the same IP as one already static
Post by: frozen on December 01, 2025, 07:58:41 PM

I just found this topic: https://forum.opnsense.org/index.php?topic=35080.0

Where a power user said the ranges can't overlap - and apparently I had that IP indeed within range, which I just narrowed down

Thanks! I will give it a try!

Title: Re: ISC DHCPv4 assigned a new device on my network the same IP as one already static
Post by: frozen on December 01, 2025, 07:58:58 PM

Quote from: Monviech (Cedrik) on December 01, 2025, 07:57:45 PMhttps://docs.opnsense.org/manual/dhcp.html#reservations

A classic one. Easy to fix.

Thank you!!

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English Forums => 25.1, 25.4 Series => Topic started by: frozen on December 01, 2025, 07:52:49 PM