1. From NAC Manager, when adding or editing a switch, the Policy Mapping should be set to RFC3580 and Extreme Policy.
2. The Vlan Policy Mapping must be set to include a VLAN as well as a filter attribute.
Tools->Managment and Configuration->Advanced Configuration->NAC Profiles
Select Profile Select Policy Mapping, add in the VLAN needed as tagged or untagged
3. On the switch, the following must be done
set policy maptable response both
configure policy maptable response both