DHCPv6 accounting

[Liviu Pislaru]

Hello,

I have DHCPv6 related question and maybe someone here can help me out 
finding the right answer.

If you use DHCP (for IPv4) and dot1x you are able to identify who's 
using what IPv4 address because MAC address information is present in 
both DHCP (MAC - IP) and Radius (MAC - SWITCH PORT - USERNAME) logs.

With DHCPv6 i didn't find a way to do that (identify what IPv6 is 
allocated to which customer) without asking any additional information 
from the customer (like DUID).
As far as i see MAC address information is not always sent to the DHCPv6 
server (DUID may contain the MAC address but not always), IPv6 LL is not 
always eui-64 generated (see Windows randomisation) to identify the MAC 
address based on that and i also didn't find a common attribute (like 
client id) for DHCPv4 and DHCPv6 to link the IPv6 address to IPv4 
address and then use IPv4 accounting.

Any ideas are most appreciated !

thanks,
--
Liviu.