Forwarding Blocks of IP Addresses to another Datacenter

If I’m not mistaken – there are ways to get IP’s allocated from one webhost/datacenter and to have them re-routed or forwarded to another datacenter – correct? I think I’ve seen such things when looking at owning your own netblock range – and it was called something like “netblock portability”, but I can’t remember what it was called for sure.

I actually have a few questions about doing such a forward:

1.) What is or would this be called? Just “IP Forwarding”? “IP Portability”? How exactly is it accomplished?

2.) Would doing this slow down the network at all? (Would a web user have to go through DatacenterA before going to the actual DatacenterB location where the web hosting was actually being done?)

3.) Would such a thing involve port forwarding? Or would DatacenterA actually somehow map the IP addresses to DatacenterB for us to use these IP addresses in our rack? I assume both datacenters might have to work in tandem to accomplish such a thing? Or is this only accomplished through ARIN?

4.) Is there a way I can do this myself with firewalls where I would use NAT or somehow map 1.1.1.1 to another, outside, public IP address at the 2nd datacenter 2.2.2.2? I assume if I can do it on my own it might wind up slightly slower due to the additional hops needed for any packets that would transmit over this network.?

I ask this for multiple reasons. One major reason is I'm looking to consolidate all of my hosting on multiple web hosts and datacenters down to one rack. I would like all sites to keep the same IP addresses and seem to outside world like they are still hosted at the original datacenters. (I don't want competitors to see that Site1 is on an IP address right next to Site2 - and thus draw the connections between them.)

 

 

 

 

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