The Cisco SD-WAN 20.3.4 Sandbox is a capability of the ATC designed to provide an environment to gain hands on experience with the latest features in the Cisco SD-WAN solution. The environment that supports the Cisco SD-WAN 20.3.4 Sandbox is completely virtual, removing any hardware dependencies associated with physical infrastructure.
Cisco continues to drive innovation in the SD-WAN market by releasing critical features in rapid succession. On August 2020, Cisco delivered the 20.3/17.3 SD-WAN release which includes: Dynamic On-Demand Tunneling, NAT DIA Tracker, BGP Community Propagation in OMP, Adaptive QoS and much, much more.
These are just some of the critical features that take Cisco SD-WAN to the next level. And in this sandbox 20.3/17.3 is available to you to explore on your own.