I really don't know how that works - we contracted it out. There is a router that has an ethernet port on it. That's our internet in. Anything in front of that

I really don't know how that works - we contracted it out. There is a router that has an ethernet port on it. That's our internet in. Anything in front of that is ours. Anything behind we don't care about but there is a 100mbit local shared ethernet and a backup FTTP line. I assume it's switched to the same network at the peer end as if either goes down, we only have one address space. We have a couple of front-facing v4 addresses that handles incoming mail. This all sits in a cabinet we don't touch owned by the provider. The stupid thing is the LSE and fibre cables leave the building in the same pipe. Wonder how long it'll be before someone digs through it.