I'm sure this is a terribly simple question, but I haven't done this sort of thing before and I can't find an example of how it's done.
I am accustomed to using routers with WAN cards like WIC-T1's etc on which the ISP delivers the Internet access which you point default at. The serial line has a /30 that is allocated out of the SP's space not out of the /24 or /28 you get assigned for your LAN or DMZ. This looks like:
Serial: 192.168.1.1 on the provider's router
192.168.1.2 on my router
Then something like:
FE0 10.10.1.1/25 -- to the LAN
FE1 10.10.1.129/25 -- DMZ
I've moved some equipment out of my comapny's office where I work and into a commercial datacenter. They have given me an ethernet handoff and two /28's pointed at the interface. Let's pretend that is 192.168.1.48/28
I have then:
FE0 192.168.1.49 at the provider's router and 192.168.1.50/28 on my FE0.
What I want to do is route the balance of that /28 out of FE1 which feeds the distribution switch in my rack.
In addition, when I went back for more address space, I was assigned 192.168.22.64/28 which also needs to route out of FE1
I have tried all sorts of slicing and dicing trying to make a /30 PtoP out of the first two addreses, but usually the IOS balks or it just doesn't Do What I Want. I've tried also to fool with IP Unnumbered (even though I know its not supposed to work on ehter), but that was a bust too.