Re: Redundant AS's

[Henk Uijterwaal <henk () ripe net>]

tvest () eyeconomics com wrote:
> On Mar 17, 2009, at 11:47 AM, Simon Brilus wrote:
>
> > Out of interest, is there a report that details the number of unused 
> > older AS's in the Internet and what is being done to recover them to 
> > recycle, as we approach the 53k mark and the 32 bit numbering scheme, 
> > it strikes me that we probably have a lot of stagnant AS's out there 
> > due to takeovers etc..
> >
> > Any thoughts?
> >
> > Simon
>
> It's a bit dated now, but the RIPE report, ASN MIA, sounds like what 
> you're looking for...
> www.apnic.net/meetings/21/docs/sigs/routing/routing-pres-uijterwaal-asn-mia.ppt 

When I look at this more recently, the conclusion still seems to be
valid: we'll run out of 16 bit ASN's somewhere in 2011 to 2013.  There
are a lot of unused ASN's out there.  Recovering them will postpone the
problem by a few years but it won't solve it.  The basic problem with
recovery is how to decide if an ASN is really no longer used/needed.
There is (still) no mechanism to do this.

Henk

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