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DHCP listing duplicate IP's for same device #5884

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opened 2026-03-04 06:42:12 -05:00 by deekerman · 7 comments

deekerman commented

2026-03-04 06:42:12 -05:00

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Originally created by @nishikant on GitHub (Jan 17, 2026).

Prerequisites

I have checked the Wiki and Discussions and found no answer
I have searched other issues and found no duplicates
I want to report a bug and not ask a question or ask for help
I have set up AdGuard Home correctly and configured clients to use it. (Use the Discussions for help with installing and configuring clients.)

Platform (OS and CPU architecture)

Custom (please mention in the description)

Installation

Custom package (OpenWrt, HomeAssistant, etc; please mention in the description)

Setup

On a router, DHCP is handled by AdGuard Home

AdGuard Home version

Version: 0.107.71

Action

DHCP should assign a IP only once to a MAC.

Expected result

No IP conflict and single IP assignment

Actual result

Additional information and/or screenshots

My setup is ISP (192.168.1.1) -> Raspberry PI 5 (192.168.1.5 [wan] & 192.168.3.1 [lan]) -> eero mesh (bridge mode: 1 main and 2 extenders). Adguardhome runs on Openwrt installed on Raspberry pi 5. DHCP runs on 192.168.3.1 and is supposed to assign IP's to all devices.

Originally created by @nishikant on GitHub (Jan 17, 2026). ### Prerequisites - [x] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) and found no answer - [x] I have searched other issues and found no duplicates - [x] I want to report a bug and not [ask a question or ask for help](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) - [x] I have set up AdGuard Home correctly and [configured clients to use it](https://github.com/AdguardTeam/AdGuardHome/wiki/Clients). (Use the [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) for help with installing and configuring clients.) ### Platform (OS and CPU architecture) Custom (please mention in the description) ### Installation Custom package (OpenWrt, HomeAssistant, etc; please mention in the description) ### Setup On a router, DHCP is handled by AdGuard Home ### AdGuard Home version Version: 0.107.71 ### Action DHCP should assign a IP only once to a MAC. ### Expected result No IP conflict and single IP assignment ### Actual result <img width="1174" height="586" alt="Image" src="https://github.com/user-attachments/assets/13b3bf9b-0c3f-47e5-b8fc-85f7313e1dc3" /> ### Additional information and/or screenshots My setup is ISP (192.168.1.1) -> Raspberry PI 5 (192.168.1.5 [wan] & 192.168.3.1 [lan]) -> eero mesh (bridge mode: 1 main and 2 extenders). Adguardhome runs on Openwrt installed on Raspberry pi 5. DHCP runs on 192.168.3.1 and is supposed to assign IP's to all devices.

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2026-03-04 06:42:12 -05:00

deekerman commented

2026-03-04 06:42:20 -05:00

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@tjharman commented on GitHub (Jan 17, 2026):

I don't see any duplicates there? They're the same MAC address assigned to the same IP. Yes, the hostname has changed but there's no IP Address conflict or actual problem here, is there?
Or do I miss something?

@tjharman commented on GitHub (Jan 17, 2026): I don't see any duplicates there? They're the same MAC address assigned to the same IP. Yes, the hostname has changed but there's no IP Address conflict or actual problem here, is there? Or do I miss something? <img width="1635" height="792" alt="Image" src="https://github.com/user-attachments/assets/7cd73d9d-a954-4664-a63b-738fcada193a" />

deekerman commented

2026-03-04 06:42:24 -05:00

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@nishikant commented on GitHub (Jan 17, 2026):

This throws error on device trying to connect. It throws IP already assigned message. Don't have a screenshot of that.

I have switched to dnsmasq dhcp for now.

@nishikant commented on GitHub (Jan 17, 2026): This throws error on device trying to connect. It throws IP already assigned message. Don't have a screenshot of that. I have switched to dnsmasq dhcp for now.

deekerman commented

2026-03-04 06:42:24 -05:00

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@tjharman commented on GitHub (Jan 17, 2026):

What is throwing the error? If AdGuardHome can you upload the log file please?

@tjharman commented on GitHub (Jan 17, 2026): What is throwing the error? If AdGuardHome can you upload the log file please?

deekerman commented

2026-03-04 06:42:24 -05:00

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@nishikant commented on GitHub (Jan 19, 2026):

This is what I see on my mac.

Will try to capture adguardhome logs and share.

@nishikant commented on GitHub (Jan 19, 2026): <img width="269" height="317" alt="Image" src="https://github.com/user-attachments/assets/2bed51be-46b5-4d14-ac9c-74751efa6b21" /> This is what I see on my mac. Will try to capture adguardhome logs and share.

deekerman commented

2026-03-04 06:42:24 -05:00

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@tjharman commented on GitHub (Jan 19, 2026):

This sounds like you have some other device handing out DHCP addresses. What does your routers arp table show?
Are you sure you didn't statically set an IP address somewhere?

I am almost certain this is a local network problem and not an AdGuardHome issue.

Did you just turn off one DHCP server and then turn on AdguardHomes? That would cause this.

@tjharman commented on GitHub (Jan 19, 2026): This sounds like you have some other device handing out DHCP addresses. What does your routers arp table show? Are you sure you didn't statically set an IP address somewhere? I am almost certain this is a local network problem and not an AdGuardHome issue. Did you just turn off one DHCP server and then turn on AdguardHomes? That would cause this.

deekerman commented

2026-03-04 06:42:24 -05:00

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@tjharman commented on GitHub (Jan 29, 2026):

Hi - any progress on this one?

@tjharman commented on GitHub (Jan 29, 2026): Hi - any progress on this one?

deekerman commented

2026-03-04 06:42:24 -05:00

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@nishikant commented on GitHub (Jan 30, 2026):

I switched the dhcp to adguardhome and faced same issue. I could not figure out how to enable dhcp logging in adguardhome. So I found a work around for this problem.

I am running this on openwrt, where the data directory is in /tmp, and it gets wiped after every reboot.

I changed adguardhome's data directory to /adguardhome by editting /etc/config/adguardhome.
option work_dir '/adguardhome'
Added /adguardhome/data/leases.json to backup config.
Configured static leases to all the devices.
This works even after unattended upgrade.

And things seems to be stable.

@nishikant commented on GitHub (Jan 30, 2026): I switched the dhcp to adguardhome and faced same issue. I could not figure out how to enable dhcp logging in adguardhome. So I found a work around for this problem. I am running this on openwrt, where the data directory is in /tmp, and it gets wiped after every reboot. 1. I changed adguardhome's data directory to /adguardhome by editting /etc/config/adguardhome. option work_dir '/adguardhome' 2. Added /adguardhome/data/leases.json to backup config. 3. Configured static leases to all the devices. 4. This works even after unattended upgrade. And things seems to be stable.

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Reference

starred/AdGuardHome#5884

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