Re: I-D ACTION:draft-wilson-class-e-00.txt

On Aug 9, 2007, at 12:11 PM, Arnt Gulbrandsen wrote:

> Douglas Otis writes:
> > The draft classifies Class-E as "Limited Use for Large Private   
> > Internets".
> What large private internets are these, really? Are we discussing  
> Google potentially needing more than one /8 for its web servers, or  
> are we discussing providers (DSL, Wimax, 802.11, GSM, 3G or other)  
> giving customers addresses from 240/4 via DHCP or PPP?
> Employees using 240/4 is one thing. Your mother-in-law getting  
> 247.1.76.22 from her cable modem is quite another.
It will likely take more than a handful of years before this range of  
addresses can be made universally usable as public IP addresses.   
Most unmodified equipment and software treat this range as non- 
routable.  Without some incentive beyond altruism, the requisite  
changes will not occur in a timely manner.  It would be wholly unfair  
to suggest to those late in asking that their assigned public address  
from this range.  However, when employed as a private address, the  
equipment and software that must be upgraded can be ascertained, and  
those that would need to make upgrades are also both motivated and  
able to ensure requisite changes are made.
A large company, Google, access providers and others will easily find  
16 million addresses are easily exceeded.  For example, by employing  
IPv4 to IPv6 proxies, large existing deployments might be readily  
transitioned to IPv6.  When done at a large scale, each event would  
have the potential of freeing up a Class-E worth of unencumbered IPv4  
addresses.  With this in mind, perhaps IPv6 should be assigned in  
blocks of 268,435,456 to any large organization. : )
Yes, there will be considerable pain when using addresses within  
Class-E.  For this to be resolved in a timeframe that has a chance of  
impacting the exhaustion of IPv4 addresses, these problems MUST BE  
resolved within the private address space.
-Doug

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