Do you have problems with RX Drops like here: http://forum.mikrotik.com/viewtopic.php?f=3&t=38343
with that machine with 16 cores and 1500 PPPoE users?
This is connected as the image attached. All ethernet ports are on bridge1. When the problem happens, I tried to swap the ethernet ports but not resolved. I tried to disable auto-negotiation but not resolved.Is ether1 is used to connect to RB3 or any other port?
In my case are three RB433AH, RB1 and RB2 connected in RB3. The RB1 and RB2 simply stop responding after a few hours. If you need more information please ask. We need to resolve this.Can you please provide exact device model to which routerboard is connected?