[ppml] alternative realities (was PIv6 for legacy holders (/wRSA + efficient use))

[John Curran]

At 5:00 PM -1000 7/31/07, Randy Bush wrote:
>how will the fact that providers get their ipv4 space from ebay as
>opposed to iana radically affect the number of prefixes which they announce?
>
>as ebay prices rise, their singly homed customers will just get smaller
>pieces and hide more behind nats, as if enough was not behind nats
>already.  but the number of announcements into the dmz will be inversely
>proportional to the chunk size the isp can get on ebay, not the number
>of singly homed customers, not a radical change at all.

You want to connect N businesses, and presently you're
assigning them various block sizes from /27 down to /22...
You're going to do this everyday until you need to get a
new block from your RIR (and presently you're getting a
/14 or so, based on past utilization)...

Surprise!  Now you have to go hunt down a /24 here, maybe
a /20 now and then (presuming some folks factor their old
assignments).   You're going to be going through several
dozen of these blocks every week in order to meet the same
customer demand.

Those blocks don't aggregate, so the routing entries are
inevitable once they're put in use.

>their multi homed customers will add one prefix with N paths into the v4
>table, just as they do today.  it will be a longer prefix as the ebay
>prices climb.  but the number of prefixes is O(multi-homed customers).

Not talking multi-homed customers; trying to serve the bread and
butter everyday business customer is going to take more routes for
the same number of new customers.

The moment that you try and squeeze down the address space
that you're providing, the customer walk to a competitor who says
that giving them that entire /24 is "no problem".

/John