kubernetes set service cidr and pod cidr the same
To reply briefly:
- You do have to reserve both the pod-network range and the service network range. You can't use those on your LAN (and you can't have routes to it). Both ranges are configurable so you can pick something that is not used. Use ipcalc if you are unsure.
- You have to use separate ranges.
Check out these slides for explanation about the different networks in play.