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Yes, that could be an awkward solution, but a solution non-the-less. Its a navy term called "hot bunking". Meaning that if you had 256 machines
you would have to share the 127 open addresses. Only 1/2 of your availiable workstations could be on the network at any given time.
DHCP (Dynamic Host Configuration Protocol, also see www.isc.org) is based on a per-scope basis. You have a dhcpd.conf file that's read at start time that has both configurations per scope, pools of IP addresses to hand out for each scope, and what restrictions, if any, on said scopes (example: drop unknown clients instead of allowing them to get an IP).
There's a handshake that goes on when a client set to obtain automatically (DHCP) sends out the UDP broadcast basically asking "Is anyone willing to give me an IP?" to which a server set to answer will say "Yeah...lemme go see who you are (checks already-read-table-of-accepted-MAC-addresses). (Found) Here's an IP (if it has it) or (Not found, option to not allow unknown clients) Get lost!."
There's some more in there but I can't remember off the top of my head right now.
This about sums up my feelings on the matter.
You can find the entire white paper at http://www.ietf.org/internet-drafts/...v7-ipv8-09.txtQuote:
And while IPv6 yields a greater number of available IP Addresses, approximately
3.4 x 10^38, it remains slightly less than IPv8's 128 Bit Address
availability of '3.40282 x 10^38'. Furthermore, when noting the benefits
offered by IPv6, which are taunted as being advantageous. No presentation
emphasizing its high lights, can suppress the severity of the drawbacks it
maintains. In fact, IPv6 is not only cumbersome and difficult to use,
implement, and employ. But, it lacks a Mathematically Derived Logical
Structure, which results in a 'Default Addressing Structure' being
superfluously defined.
IP6 ... the Novell-ization of hostnames. :) You know ... I'd doubt we'd have such an imminent need for 3.4 x 10^38 distinct addresses if we could clear out SPAM-based black-hole addresses. Mmmmm ... what a great world that'd be. :)
~N~