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cc: freebsd-net@freebsd.org
cc: Supote Leelasupphakorn <pjn0211@yahoo.com>
Subject: Re: How can I subnetting my network ?
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<snip>
>    I want to build a network as shown below.
> All devices is in my responsibity except the
> upsteam router. My question is 
> 
>    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 ?
<snip>

Have a look here:

http://ezine.daemonnews.org/200211/ipfilter-bridge.html