The short syntax of static IPv6 route is:
ipv6 route <destination-IPv6-address> {next-hop-IPv6-address | exit-interface}

Explanation:
Controller-based Networking :
- This type deploys a consistent configuration across multiple devices.
- Southbound APIs are used to apply configurations.
Traditional Networking :
- A distributed control plane is needed.
- This type requires a distributed management plane.
On a SND network the control plane is centralized on the the SND controller not distributed on the networking devices.
Northbound APIs do not interact with end devices. They allow the SND controller to interact with applications on the application plane

JSON data is written as name/value pairs.
A name/value pair consists of a field name (in double quotes), followed by a colon, followed by a value:
"name":"Mark"
JSON can use arrays. Array values must be of type string, number, object, array, boolean or null..
For example:
{
"name":"John",
"age":30,
"cars":[ "Ford", "BMW", "Fiat" ]
}