How can I subnetting my network ?

[Lowell Gilbert]

Supote Leelasupphakorn <pjn0211 at yahoo.com> writes:

>    If I will assign public IP address to all 
>    interfaces, is it neccessary that I must
>    inform the upstream router's administrator 
>    to add my subnet in routing table of upstream
>    router ?

Yes; if you actually "own" your own subnet and the upstream
administrator will agree to route it at all.

If not, you'll need NAT.