In legacy IPv4 networks there exists a default route concept for routers where a router does not need to know exact destination of IP packet.
Is there a default action concept for SDN switches? Let me explain my case with an example:
I will insert a tcp flow whose destination layer 4 port is 80. But at the same time I want to handle icmp flows and arp queries. For doing this I will insert a tcp flow in switch with a high priority and at the same time I want to add a best effort flow which handles all other conditions.