Is SNMP mac notification for switch really works with NAC OOB deployment? We have been trying to test in a POC setup for NAC where the PC with NAC agent is connected behind a Cisco and Nortel IP phones. Once the PC is disconnected behind the IP phone the NAC manager can't received snmp mac notifcation from the switch hence, the user is not automatically removed on the online users or certified devices. Were using NAC version 4.6 and C3750 switch version 12.2(35)SE2 and 12.2(35)SE5. We know there is a bug related regarding mac notification on switch ios version 12.2(25)SEC2 or lower but on stack switches. But were using standalone switches only for the testing and higher IOS version. Hope someone could help me verify on this on what specifically ios version of switch is working properly with snmp mac notification?