hi,
what are the purpose of interconnect..?and why we nedd address routing table..in axi4
The AXI4 protocol just describes the interfaces you will see on master and slave components.
So unless your system just has one master and one slave directly connected together, you will need some sort of bus fabric (interconnect) to connect multiple masters and slaves together.
This "interconnect" logic then needs to include address decoding logic so that it knows which slave to route a master's transfers to.