Private IPs for your slices
www.slicehost.com/articles/2008/8/7/private-ips-for-your-slices
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Today we’re pleased to announce a long overdue feature – private IPs for customers with multiple slices. Those of you load-balancing across slices, employing a database cluster/server or syncing between slices will find this option perfect for inter-slice communication. Most importantly, bandwidth on private interfaces will not be metered and therefore does not count toward your per slice transfer limits. We hope this makes life a bit easier for our larger customers using several slices with lots of chatter. Private IPs can be obtained by opening a support issue and there is no charge. We’re looking forward to everyone’s feedback!