[arin-ppml] Comcast

Stephen Sprunk stephen at sprunk.org
Tue Nov 9 11:13:40 EST 2010

On 08 Nov 2010 22:49, Ted Mittelstaedt wrote:
> Obviously Comcast would have never qualified for a /9 when they were 
> first getting started.  So they must have renumbered dozens of times
> as they got larger and worked their way up in size, qualifying for
> larger and larger allocations.
> It must have been holy hell on their customers to have to go through
> all that renumbering, though.

There is no policy that _requires_ an org to return smaller
allocations/assignments when they qualify for a larger one.  As you
note, that would cause a lot of renumbering as the org grows.  Policy
_allows_ orgs to exchange multiple smaller blocks for a single larger
one, but I suspect that's fairly rare.

This is the primary reason why the prefix:AS ratio is so high with
IPv4.  That is also the reason why the goal is to give ridiculously
large IPv6 blocks: to keep the prefix:AS ratio as low as possible.


Stephen Sprunk         "God does not play dice."  --Albert Einstein
CCIE #3723         "God is an inveterate gambler, and He throws the
K5SSS        dice at every possible opportunity." --Stephen Hawking

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 3646 bytes
Desc: S/MIME Cryptographic Signature
URL: <https://lists.arin.net/pipermail/arin-ppml/attachments/20101109/9c0c00b0/attachment-0001.p7s>

More information about the ARIN-PPML mailing list