Query CM IP Prefix/CM Mac mapping via SNMP

Hey,

Sorry if this is a really silly question, I'm trying to find if its possible to query a CMTS via SNMP to retrieve the CM MAC -> IPv6 Prefix deligation,
I've tried a few different MIB's and OID's but so far hasn't worked i.e. on example was 1.3.6.1.4.1.9.9.116.1.3.10
I'm guessing if not SNMP I can do over DHCP or ssh remote command execution

Cheers any input appreciated
Thanks
:D
Deano