Never mind corporate changes, why should an allocatee not subdivide their space among their operating units or sites? To answer your specific question, all of the ones I have seen, the space has been divided on ARIN allocation boundaries. Roy Engehausen Bill Nickless wrote:
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The question seems (in my opinion) to be whether registries are delegating netblocks that can be further subdivided, or not.
That is, some ISPs hold that if a registry has allocated /16s in some space, those allocations should not be subdivided by the allocatees. If a registry is allocating /19s minimum in some other space, then the allocatees cannot and should not split that space and advertise longer prefixes.
In practice, how have corporate divestitures been handled by the registries? Have organizations with portable netblocks been able to split them up and get new allocations from the registries, following the corporate reorganizations?
Surely someone on this list has worked through such an event. How did it go? === Bill Nickless http://www.mcs.anl.gov/people/nickless +1 630 252 7390 PGP:0E 0F 16 80 C5 B1 69 52 E1 44 1A A5 0E 1B 74 F7 nickless@mcs.anl.gov
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