Hi everyone, I’ve added vlan3 to my LAN interface list and also excluded LAN from the WAN interface list. However, each time the router still detects vlan3 as a WAN interface dynamically — even though it’s already assigned to the LAN list. Does anyone know why this happens or how I can stop VLAN3…

As people have been told many times on this forum: You should not use the "Detect Internet" features. It's buggy and is known to cause many unwanted problems. Set all lists to none and forget that it exists. [image]

Thank you so much :folded_hands:

... and it is Rule #5: [image] The twelve Rules of Mikrotik Club Beginner Basics Preamble and disclaimer: The following is a set of Rules that are intended as advice useful to avoid the most common errors observed in configuration posted on this forum. It is …

LAN interface keeps being detected as WAN interface

RouterOS

jaclaz October 16, 2025, 3:34pm 4

... and it is Rule #5: