Hi all,
I have a new RB1200 and I onfigured different networks on the different ports.
So fine.
The routing table shows all the networks connected and I entered a default route to 10.0.0.1, which is my gateway.
Routing table shows reachable.

But no traffic is going from one port to an other and ping is not possible.
Why is that?

If I put all these ports in a bridge then the traffic is passing, but why do I need a bridge in a router? Is the bridge not that what a simple switch is doing?

Thanks and sorry for my simple questions.

What entries do you have in /IP Firewall? If there are no entries in the forwarding chain then all traffic will normally be forwarded among the various attached networks according to the routing table.

No entries in IP Firewall.

Now with the bridge configured the router is working like a simple switch, isn't it?

No entries in IP Firewall.

Now with the bridge configured the router is working like a simple switch, isn't it?

Yes -in simple terms a switch is simply a multi-port bridge.

Can you upload output from /export compact so we can see why you were not observing routing among the attached subnets?

Sorry to come back late, but I had some issue to solve.
I can not post the output, as the router is in working environement and I need to make the changes during night hours.
Let me see when is a good time to rebuild the config and then I will post it.

Is there a simple description for acomplete config somewhere in the web?

Now let's come back to that topic.
Attached is my high level topology.

The blue boxes have all a DHCP server running.
The traffic is going via the modem on 10.0.0.1 to the ISP.

Initially I want to use a seperate subnet for each interface on RB1200 for ET2 ET3 and ET4, but my problem was the traffic was not routed to ET1. So now I used the same subnet and bridge the interfaces.

So what I missed in my initial config?
I used one IP@ from each subnet for the RB interfaces.
Then I was thinking the connected networks are known by the router and the traffic is handled automatically. The networks where known, but no traffic was routed to Et1.
I configured as well a DHCP server per interface and I put a default route to 10.0.0.1.
What did I missed?
What else I need to configure?

Thank you

Has nobody any hint for me here in this forum?
Waiting for your feedback please!
Thank you