The enterprise need a connection between the branch and headquarter offices.
There will be requirement of adjusting the bandwidth of the connenction on demand.
The adjustment can be triggered by "conditions" meet.
- E.g. The bandwidth will be adjusted when the timing meets. At night with more bandwidth for back traffic.
- E.g. The bandwidth adjustment can also be triggered by traffic bursting.
This use case can also be generalized to more resource (node, connection) reservation policies.