The address space you were assigned from the Mother ISP is more than
likely going to be out of a larger block the Mother ISP was assigned from
ARIN. Say your /24 prefix (Class C) is part of a /16 (Class B) that they
own.. They only announce the /16 to their peers unless a specific situation
arises where they'd need to send the /24. All of the Major ISP's and org's
follow this procedure and that's why we don't have 9,000,000 routes in our
routing tables.. :).. Route aggregation is the term..
So to answer your question.. :)..
Mother ISP assigns /24 to you statically. Then they redistribute that
throughout their Autonomous Systems using a Dynamic routing protocol so all
of the internal routers know the path to the router you're connect to, and
then only announce the /16 to their peers. Everyone knows how to get to
everyone else..
Hope that answers your question.
Mas
"Tony van Ree" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi,
>
> We provide a service to thousands of clients with anything from full class
"B" to 4 addresses out of a class "C". In a nutshell you place a default
static back to the supplier. The supplier has a static pointing your class
"C" down your link.
>
> In a number of places this is managed by auto type processes for example
going into a customer area and adding the routes you own to your service.
The process then updates the router from the supplier to you.
>
> Teunis
> Hobart, Tasmania
> Australia
>
>
> On Saturday, December 30, 2000 at 07:49:57 AM, gary gary wrote:
>
> > Hi guys:
> > We are a small ISP, just using static routing connect
> > the mother ISP, the mother ISP assign a class C
> > address to us, I want to know how the mother ISP
> > locate the Class c networking , just using static
> > routing? Need they redistribute the static to their
> > dynamic routing (for example OSPF) in order to the
> > internet router know the class c network,?
> > Did the mother ISP create the stub area, then assign
> > the lots of ip address to stub area ,if so how to
> > create the stub area by static routing? Anyone can
> > give me some configuration,
> >
> >
> > Thanks in advice
> >
> >
> >
> > gary
> >
> >
> >
> >
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