Re: [isp-bgp] Most inefficient use of allocation list?

[Pete Templin <petelists@...>]

David Hubbard wrote:
> Out of curiosity, has anyone ever put together a
> list of ASN's that make the most inefficient use of
> their allocations?  An example would be some of the
> universities with a /8 prefix but only 50k addresses
> in use. :-)
The CIDR Report lists the ASNs that are the most inefficient about 
deaggregating their prefixes.  http://www.cidr-report.org.  Sometimes 
the deaggregation is a necessary part of IPv4 multihoming, but I just 
brought on a customer who "insisted" on being able to announce any/all 
/24s from his /19.  Granted, he's two-homed without connectivity between 
homes, so he'll need to migrate, but I told him if I found all 32x/24 
from his connection to us and none from anywhere else, he'd have to 
aggregate at that moment.

pt





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