Southbound API

Question 1

OpenFlow

Answer 1

Industry-standard API, It configures whit label switches, meaning that they are nonproprietary, and as a result defines the flow path through the network. All the configuration is done through NETCONF.

Question 2

NETCONF

Answer 2

Using RPC, you can install, manipulate, and delete the configuration of network devices using XML.
is a protocol that allows you to modify the configuration of a networking device, but if you want to modify the device’s forwarding table, then the OpenFlow protocol is the way to go

Question 3

onePK

Answer 3

allows you to inspect or modify the network element configuration without hardware upgrades

Question 4

OpFlex

Answer 4

uses a declarative SDN model because the controller, which Cisco calls the APIC, sends a more abstract, “summary policy” to the network elements. The summary policy makes the controller believe that the network elements will implement the required changes using the own control planes, since the devices will use a partially centralized control plan