Add setup inter-cluster networking to demo sandbox

[johnbelamaric]

No description provided.

[johnbelamaric]

• We can take a look at the operator Wim's team developed, time is a concern
• However, as a fallback, we can have a tool that runs after all clusters are created and generates a containerlab topology.

The second option makes horizontal scale out by adding a cluster not really work well.

[gvbalaji]

Hold off on PRs for dynamic inter-cluster networking.

[gvbalaji]

For static configuration :
Bring up all clusters
Run container lab
Wim has scripts for dynamic networking but this can wait post R1.

[johnbelamaric]

This is done