Well, you set your edge routers that you use to interconnect with other carriers up so that other carriers (aka BGP peers) can't advertise weird bullshit IP routes to you - anything less than a /24 for example. You also gotta set it up so that you'll only accept X number of routes from your peers so that if shit breaks (it will) then the damage to you is mitigated. Trust me, you never want your BGP table to get overloaded.
No ISP is an island and we all have to work together to make sure the Internet can be all it can be.
So wait, this dude is a bot? I was hoping Merk could have a new network mans to discuss base GDP packet routing over a IXR network on Cisco 64440 LR hardware.
It's Gigabit Data Packeting on a Interlaced XR network you pleb. Don't even get me started on the IEEE 304.55 standard. It's like it's 1995 all over again.
BGP stands for "Border Gateway Protocol" and it is THE routing protocol that makes the Internet work. All it essentially does is allow autonomous systems (AS) to exchange routes with each other, usually in a predetermined agreement between the two parties. An autonomous system is basically any entity that owns IP space from the regional internet register, the one used for the US is called "ARIN" or American Register for Internet Numbers and there are of course other registers out there for different areas like Europe and Asia.
You can do a lot of funky stuff with it and it even has the exciting feature of being able to break other people's shit if you're not careful!