Is it possible to expose the IP phone MAC addresses via LDAP on CUCM?  The objective is to use ACS to do MAC lookups using CUCM as a Identity Store for a Identity Based Networking Solution I am developing.  We have all 7940 phones that can't do 802.1x and I was curious if we could just tell ACS to go look for the MAC that is already present in CUCM, rather than have to setup some type of double entering process for phones.

We are running CUCM 7.1 and ACS 5.1.

Any ideas?

Thanks,

Mike