Re: IPv6 Allocation Policy

On Mon, 19 May 2003, Craig A. Huegen wrote:
> On Mon, 19 May 2003, Pekka Savola wrote:
> > > Because I pay ISP's to bring traffic to me.  If I announce the /32
> > > everywhere, then I have to build and manage my own Internet backbone to
> > > carry the traffic globally (in parallel with my internal/clean WAN).  That
> > > amounts to paying two service providers to carry the traffic where I need
> > > it.
> >
> > I don't quite understand this, so I take it there may be some unstated
> > assumptions here.
> >
> > You mean that if you have two physically separate sites with each e.g. /33
> > block, and would announce the /32 block at both points, you would have to
> > have more extensive & expensive internal WAN (carrying the other half, /33
> > to the other physical location) to the -- and your WAN could not handle
> > it?
> >
> > This seems to call for separate addresses to separate sites under
> > different ISPs.  Oh.. that was called PA.
> 
> This company I know has 5 primary Internet route points, one for the west
> coast of the US, one for the east coast of the US, one in western Europe,
> one in Australia, and one in northern Asia.  Each has a minimum of 2
> providers, some have 4.  If this company advertises the /32 from each SP
> at each route point, traffic is going to jump to that company at the first
> possible point.  This particular company has the greatest majority of its
> traffic arriving at the west coast of the US.  BGP doesn't exactly have
> the best intelligence when it comes to network proximity, so there are
> cases when a European ISP might end up sending traffic to this company's
> western US presence only to have the company's WAN backhaul it to Europe
> for its final destination.
> 
> So, in essence it calls for separate addressing to separate sites with
> multiple ISP's at the same site.  This company uses PA space when only one
> provider is present at a site (smaller access points).

What is the percentage of the traffic in the known services, vs. the rest?

IE. if e.g. the web and ftp servers were numbered using PA-based addresses
from multiple ISPs (not that big a deal, there's only a limited number of
such services), but the employee hosts etc. would use a company,
globe-wide /32 address, would advertising the /32 in all the locations be
a problem?

Luckily enough we have Mobile IPv6 with Route Optimization ;-).

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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