RE: was bogon filters, now "Brief Segue on 1918"

["TJ" <trejrco () gmail com>]

Michael - good points all, and saved me typing out a reply.

Additionally, using up the RFC1918 space isn't the only problem ... the
previously mentioned collision problems between so-called private networks
become more and more likely (until almost guaranteed).


Only nit:
        "In any case, IPv4 is yesterday's news. Nowadays everyone is
scrambling to integrate IPv6 into their networks and shift services onto
IPv6."
... I would say they should be doing so; I wish more were!!


/TJ

> -----Original Message-----
> From: michael.dillon () bt com [mailto:michael.dillon () bt com]
> Sent: Thursday, August 07, 2008 1:06 PM
> To: nanog () nanog org
> Subject: RE: was bogon filters, now "Brief Segue on 1918"
>
> > Your point seemed to be that
> > it is not a large enough allocation of IPs for an  international
> > enterprise of 80K souls.  My rebuttal is: 16.5  million IPs isn't
> > enough?
>
> You don't seem to understand how IPv4 networks are designed and how that
> interacts with scale, i.e. the large sprawling networks that international
> enterprises have. You don't simply count out x addresses per employee.
> Instead, you design a subnet architecture that a) can grow at all levels,
> and b) can be cut off the network when you sell off a branch operation or
> two.
>
> This leads to large amounts of IP addresses used up in padding at all
> levels, which then leads to these organizations running out of RFC 1918
> space, a more and more common occurence. This, in itself, is a good
> incentive to move to IPv6, since the seemingly wasteful subnet architecture
> is considered best practice with IPv6, and a ULA prefix or two gives you
> lots of space to keep growing.
>
> >  What are we talking
> > about then?  100 IPs per person--say each person has 10 PCs, 10
> > printers, 10 automated factory machines, 10 lab instruments, 49
> > servers and the soda machine on their network?
>
> Nope. We are not talking about people, but about network architecture and
> topology. Two people in one office need two addresses. Put them in separate
> offices and they need two subnets. Topology dominates the design.
>
> > I don't think you have that many soda machines.  Even on 5 continents.
> > Even with your growing Asian market, your suppliers, and the whole
> > marketing team.
>
> I believe the first two companies to run out of RFC 1918 space (or to
> project that it would happen) are Comcast, and American cable provider in
> one continent, and a Japanese cable provider on a small Pacific island next
> to China.
>
> > //Err.  Doing it wrong does not justify doing it wrong.
>
> Cute sound bites does not make you an expert in anything.
>
> In any case, IPv4 is yesterday's news. Nowadays everyone is scrambling to
> integrate IPv6 into their networks and shift services onto IPv6.
>
> --Michael Dillon