[arin-ppml] On the topic of longer prefixes...

John Curran jcurran at arin.net
Wed Jul 29 01:10:15 EDT 2009

> On Jul 28, 2009, at 11:39 AM, Joel Jaeggli wrote:
> ...It seems likely that at some point networks will likely routinely  
> accept
> longer prefixes than /24.

Taking the long view: once ISP's are unable to obtain any additional  
allocations from the RIRs (due to free pool depletion), there will be a
significant focus on recovery of space from less than efficient internal
(and possibly client) assignments.  I'd expect such space to be  
to new clients very small assignments (e.g. /30), with nominal effect on
the routing table since the covering routes are already present.

The real question is what happens at that point when a new customer  
up and says that his friend's letting him to use a piece (e.g. /30) of  
friend's 'class C' network... i.e. if new native IPv4 service requires a
BYOA (Bring Your Own Address) approach due to lack of available  
will ISP's turn down new business that doesn't come with own IPv4  
block of
least /24 in size?


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