Segment routing is changing the game in terms of ability to deploy Traffic Engineering widely as it overcomes the limitations imposed by RSVP-TE. The source routing paradigm makes the network programmable and allows for external controller to provide more scale and granular path calculation constraints. This lab will go over using a Crosswork Network Controller (CNC) to easily provision SR-TE with MPLS and SRv6. Further, visualize and get metrics from CNC to understand how these policies are working. See how real time optimization works when topology changes. Bandwidth use cases and P2MP SR (TREE SID) are introduced.