Create GRE tunnels:
- WindRiver -> router-001
- Ysul -> router-001
- CloudHugger -> router-001
Eglide can currently be ignored.
Hypervisors offers a small router server instance to use with a virtual card on each machine (e.g. IntraNought, see T1478). We can use one of them, let's pick router-001, to link baremetals.