Greetings,
I spent the week sweeping forums looking for the solution to the problem that was occurring on our network. We have a connection to the local PTT(ATM), and were notified that we were launching dchp on the network, which is highly prohibited. I immediately went to check the equipment settings and there was no dchp configured. So I started the search … I made filters of brigde, ip filter, and nothing solved, all my interfaces both outgoing or incoming links, were with dchp traffic.
Today I decided to check the new feature available in version 6.41 Detect net, and discover that it is the cause of the “problem”, the resource creates Dchp clients, for the interfaces generating traffic, to solve the problem, simply disable the feature.
https://wiki.mikrotik.com/wiki/Manual:Detect_internet
{
WAN
Any L3 tunnel and LTE interfaces will initially have this state. Layer 2 interfaces can obtain this state if:
interface has an active route to 8.8.8.8.
interface can obtain (or has obtained) an address from DHCP (does not apply if DHCP server is also running Detect Internet on the DHCP server interface).
};