Lease information operations.

[PavelTilinin]

Hello..
The situation is the following:
I'm using Option 82 on switches in the network to identify users, 
requesting for IP-address via dhcp. It is impossible to identify them in 
some another way, because there is no layer2 connectivity between users 
and dhcp-server. I have built classes-based rules to provide a concrete 
IP-address for each user (to identify that user later by his ip). It 
becomes a very big waste of IP resourses, and a whole sense of dynamic 
ip delegation is lost:(
So there is a question:
Does anybody know, is it possible to send lease information (with Agent 
circuit-id and remote-id) to some remote host (Any way, either a radius 
server or randomly created socket), when client requesting/renewing his 
IP-address? Is it possible to operate by lease information in ANY 
another way, then just parsing of "dhcp.leases" file?

Scheme must be the following: Some host requests for an ip, dhcp-server 
receives this request, does decoding of option 82 and sends this option 
and other lease information to remote server. After that, allocates ip 
for host and sending an offer.

Every idea will be useful.. I will thank everyone...