Simple static LAN issue when RB between clients

RouterOS General
1

Hi,

I have strange issue with one RB760iGS. The configuration is very simple:

# model = RB760iGS
/interface bridge
add name=bridge
/interface bridge port
add bridge=bridge interface=ether1
add bridge=bridge interface=ether2
add bridge=bridge interface=ether3
add bridge=bridge interface=ether4
add bridge=bridge interface=ether5
/ip address
add address=192.168.10.14/24 interface=ether4 network=192.168.10.0
add address=192.168.10.15/24 interface=ether5 network=192.168.10.0
add address=192.168.10.13/24 interface=ether3 network=192.168.10.0
add address=192.168.10.12/24 interface=ether2 network=192.168.10.0

PC has static IP 192.168.10.121 and one device has 192.168.10.120

When I connect the device to the PC directly, I can PING both sides and operate normally.

When I connect PC and the device to the RB760, I can connect via winbox, but cant access the device or PC (not even pinging) from the RB, but from PC I can ping all IPs 192.168.10.12 to 192.168.10.14.

Is there anything else I am missing in this simple configuration?

2

If you create bridge and then connect ports to it then forget assigning IP to ports. They should be treated just as “dumb connectors”. Everything should be done on the bridge. Assign one IP to the bridge, remove IPs from ports - btw in the Winbox they probably are shown in the red - and everything should start to work.