How do I send a packet from source to destination with an explicit route?

[kaganndemirr]

I built a network in INET 4.5 with TSN switches and end systems. I got all switches and end systems from INET's TSN showcase. In my topology there are multiple paths between a source and destination and not all of them are shortest paths. Except for the FRER example, in other TSN showcases there is only one path from a source to a destination. Although I don't know, either a spanning tree or a mechanism like OSPF is used to find a route and forward the packet that way. In my network, when I do not define any forwarding table, it forwards packets from the shortest path, but I want to define my own path. For this, looking at the FRER example:

*.macForwardingTableConfigurator.typename = ""

and

*.s1.macTable.forwardingTable = [{address: "destination", vlan: 1, interface: "eth0"}
                                 {address: "destination", vlan: 2, interface: "eth1"}]

*.s1.ieee8021q.qTagHeaderChecker.vlanIdFilter = [1]
*.s1.bridging.streamRelay.typename = "StreamRelayLayer"
*.s1.bridging.streamCoder.typename = "StreamCoderLayer"
*.s1.bridging.streamCoder.decoder.mapping = [{interface: "eth2", vlan: 1, stream: "s1"}]

Based on the definitions I wrote in the second part, I applied the forwarding table to my topology. However this time in the first switch of the path, it sends it to all its neighbors as if it is being broadcast. I also checked Scenario manager and I don't see such a feature in it. I can't think of anything other than destination based forwarding (the approach in FRER example) and but I didn't succeed in that either. I am new to INET. How can I do it?