Hello, i have a problem with my RB493G.
I cannot use ports from switch1 group.
All ports from switch2 works perfectly (i resetted RB and re-configured everything from start to make sure it’s not my mistake - now all ports is just bridged with DHCP server sit on top of bridge).
I can see proper port state, it detects mode (ie 100mbit/1gbit), it also show some TX traffic, but not RX. Yeah, i verified cable, it’s not broken.
If i plug cable to one of sw2 port, it can detect RB with winbox (mac-based login, for example). It does not work with sw1 - there is no RX at all.
It, however, starts working randomly after reboot. But it’s very rare.
Please don’t say that this port group is dead 
ROS 5.18.