Backbone

The backbone network is a transportation network at an upper routing level. Its role is to transport cart from regions to regions. It does not contain stations and rings.

The backbone network is made of:

• backbone routers using BC8020 signs
• backbone link to link backbone routers together, that are like rings with no stations at all
• interlink ring, to attach backbone routers to regions. This special ring does not contain stations and has a backbone router at one end, and a region router at the other end.

Making a backbone network is very simple : just make routers (with BC8020 sign) close from the ring 0 of the region they must connect. Plug them into the ring 0 of the region, and link all the backbone routers together with empty rings. A single backbone router can attach up to 3 regions (4 if there is only one backbone router in your world), the 4th interface is connected to the backbone network.

Launch a backbone updater from a free interface of a backbone router : it will become the region 0. Wait until the updater completes its configuration and that's all.