more specific routes in today reality

> > > assume that I
> > > am cost concious resdient with a sattelite down-link (yupp, 
> > > they exist),
> > > and a DSL line and a Cable link. Should I not be allowed 
> the same easy
> > > choice of up-link as the corporate world? 
> > > 
> > > Let's then assume that I have my home on VoIP only so NAT is 
> > > out. Do I get
> > > my own AS-number and PA space then?
> > > 
> > 
> > You are using three different IP addresses that are 
> dynamically (OK. If you
> > insist statically) assigned to three different links. But 
> how can I reach
> > your web server ?
> > This is different from the corporate world to have the same 
> IP coming in
> > from different links.
> 
> If I only have three addresses I need some form of NAT on my 
> home network,
> and that will brak my services as well as block the 
> Web-server, just as
> point out. So I need a routable block.
> 

OK. There are two different requirements here. One is people just want to
connect to Internet and have different links for back-up thus no-need for
static IP. 

The problem will be the SOHO customers running application that needs static
IP address. Assume they uses /28 then it will be a big problem for the
up-stream
to leak them into the global routing table. By just filtering out /28 won't
solve
the problem. But I think it is a little bit easier to make them to be
reassigned to
the aggregate block with their back-up link provider, don't you think ?

This way, we can have the cake and eat it too.


> > > > In this situation the most popular solution for local 
> > > customer, who needs 
> > > > reliable and cheap IP uplink and high speed access to 
> > > regional Internet 
> > > > resources, is to build two channels to local ISPs (not so 
> > > reliable, but much
> > > > more cheaper than even one external uplink) and to local IX. 
> > 
> > In this SOHO situation you don't need a seperate entry in the 
> > global routing table. Also the point is two links (phone line won't
> > die the same time as the satellite, will they ?)
> 
> No, but in order to use this Sat uplink  I need to have 
> globally routable
> address block. Which will pollut the routigtable. So in my extream
> example, we would end up with a address block per SOHO user.
> 
> - kurtis -
>

My point is still you can have these customers' business and making sure
they
are ASSIGNED (by you) on the aggregate block so the other ISP can aggregate
them.


Ping Lu
Cable & Wireless USA
Network Tools and Analysis Group
W: +1-703-292-2359
E: plu at cw.net