Your assumptions, based on the information you have provided, are correct. At lot of it depend on y our network architecture. If we take the routes that you show as the only routes in your table then, you are correct. Traffic to 10.11.10.21 would go no where. Unless there is a default route installed. It is possible, and not shown here, that there might be some dynamic route (OSPF, RIP). We would only be able to know that if you do a "show ip route". Could you share that? It is also possible that policy based forwarding could be used. In this case, routing would not impact how packets move across the switch. In summary, we3 would have to look at your entire routing table and configuration to determine how things are being forwarded.