As a consequence, a wide area network (WAN) that inter-connects the distributed cloud must be able to deal with more dynamically changing traffic patterns. New solutions that allow for automated and cost-efficient mapping of traffic flows to available network resources are needed to keep transmission costs low and network performance up.
Traffic Engineering (TE) with a centralized control plane is proposed as a new method of achieving network elasticity while maximizing resource utilization in the wide area network that connects the distributed cloud.
The approach is characterized by two concepts:
- abstracting data centers as virtual Provider Edge (vPE)
- TE with centralized path computation (PCE).
Segment Routing (SR) is evaluated as a novel data-plane technology that promises simpler and more scalable ways of managing paths in Multiprotocol Label Switching (MPLS) networks.