A Gentle Introduction to Routing Oct 8, 2008, 23 :31 UTC (0 Talkback[s]) (3182 reads) (Other stories by Charlie Schluting)
"Before we get into the details, a clarification. When you hear people refer to "non-routable addresses," they are talking about RFC 1918 IP addresses, i.e. private addresses. Despite the misleading label, they certainly are routable. You can and should have some 10.x.x.x networks for local access and management. They can even be co-mingled with your real routers. They are called “non-routable” because the Internet routers will drop them. You should drop these packets at your border, as was pointed out in this Border Security article last year. This is a point of confusion for a lot of people."
