# Weird IP adress conflicts on route10 router **URL:** \ **Category:** Routers\ **Tags:** router, route10\ **Created:** [August 28, 2026, 11:58am UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969 "2026-08-28T11:58:58Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![alabs](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@alabs](https://forum.alta.inc/u/alabs)\ **Post date:** [August 28, 2026, 11:58am UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/1 "2026-08-28T11:58:58Z")
Hi there, I’ve seen all threads with this topic (**[IP Address Conflict(s) detected](https://forum.alta.inc/t/ip-address-conflict-s-detected/5035)) and it is 2026 and still having this problem on the route10.** My network is simple. 1 VLAN DHCP range a.b.c.50 to a.b.c.199 1 DMZ Nothing fancy and yet randomly getting IP conflicts. ![image](https://forum.alta.inc/uploads/default/original/2X/1/168632d1e078e7060d79000a8f57b4788159cd07.png) First the router IP a.b.c.1 was in conflict with the Cox ONT which was weird. Then I changed the router to a.b.c.2 and it was fine until devices (20-25 of them) connect. It seems to appear with direct connect ethernet on my switch (dumb one from Zyxel) but OUI and GPT says that for some it is a randomized MAC address. So what’s up? Never had that with my former router. ---
**Author:** ![dison4linux](https://forum.alta.inc/user_avatar/forum.alta.inc/dison4linux/32/5435_2.png) [@dison4linux](https://forum.alta.inc/u/dison4linux)\ **Post date:** [August 28, 2026, 3:44pm UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/2 "2026-08-28T15:44:30Z")
I just had the same thing happen too. A new device was added to the wifi network and it grabbed the same IP address that was already reserved for another device. Not sure if is somehow caused by 1.5f but I’ve never seen this before upgrading to 1.5f. ---
**Author:** ![alabs](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@alabs](https://forum.alta.inc/u/alabs)\ **Post date:** [August 28, 2026, 4:53pm UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/3 "2026-08-28T16:53:41Z")
I do run 1.5f as well but I just setup my network a few days ago and it started to pop randomly. Seems like it was an issue according to some threads back in 2025 so either a bug got re-introduced or it has never been really fixed. ---
**Author:** ![alabs](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@alabs](https://forum.alta.inc/u/alabs)\ **Post date:** [August 29, 2026, 11:57am UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/4 "2026-08-29T11:57:17Z")
Since I turned on “Use ARP Requests for IPs” it feels like the conflicts disappeared. Can you give it a try? That is just a work around though if that effectively works, still something funky with the firmware. ---
**Author:** ![dison4linux](https://forum.alta.inc/user_avatar/forum.alta.inc/dison4linux/32/5435_2.png) [@dison4linux](https://forum.alta.inc/u/dison4linux)\ **Post date:** [August 30, 2026, 2:50am UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/5 "2026-08-30T02:50:15Z")
That setting only applies to switches, and I don’t have any Alta switches. ---
**Author:** ![alabs](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@alabs](https://forum.alta.inc/u/alabs)\ **Post date:** [August 30, 2026, 4:45am UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/6 "2026-08-30T04:45:13Z")
Even though the feature originated to help switches map IP addresses, toggling it in the site-level or router profile alters how client telemetry is reconciled across your Alta Control dashboard. Forcing ARP-based IP learning purges outdated table entries that produce the visual and functional duplicate IP errors. Try it and report if you can. ---
**Author:** ![alabs](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@alabs](https://forum.alta.inc/u/alabs)\ **Post date:** [September 1, 2026, 6:26pm UTC](https://forum.alta.inc/t/weird-ip-adress-conflicts-on-route10-router/6969/7 "2026-09-01T18:26:42Z")
Just got 3 IP conflicts, those are smart tvs. Weird as they are turned off but connected with RJ45… Alta should have a better way to clean up DHCP leases. ![image](https://forum.alta.inc/uploads/default/original/2X/7/75c49d73a7cb708aec58daa90aee65110f95c5d6.png)