Hi,I ever have configure ic4500 with Nortel 802.1x switch Authentication 1.configure Authencation Serever ( Local,LDAP,AD etc ) Realm and Role 2.configure User Realm to bind to your Authentication Server 3.configure User Role to separate user groups 4.map your user group to any Role at Role mapping 5.enable your Role to be Agent mode dot1x 6.configure Radius group ( group of switch,building floor etc ) 7.configure Radius client ( each your dot1x switch ) and map to Radius group 8.configure Radius Attribute ( which Role will got which vlan-id ) Radius client 9.configure your dot1x switch to know ic as radius server follow by your switch guide OAC 10.install OAC on your PC 11.create profile,select log in method ( should be use "prompt log in name and password" ),disable "validate server certificate" 12.select your wire adapter to be operate by OAC 13.bind your profile to your adapter 14.try to log in with username and password on you Authentication Server,you will got right vlan depend on user Please use those steps be your guide,I'm not sure I'm forgot somethings or not. Regards. Ohyeh. ... View more