I am experiencing strange behaviour on one port of RB5009UPR. the connection is
isp — poe injektor — eth1
When mikrotik reboots, eth1 is not connected, no lights show on the port. If I take out the cable, it helps not. I have to take out the cable from eth1, put it to eth2 this makes lights on eth2 come up and then i can put it back to eth1 and suddenly the link is there. I checked different cable, no change.
Interestingly, i observed that during boot, the eth1 several times slowly blinks green before becoming completely dead.
Anyone has an idea what this is?