I've looked over the release notes and NAD compatibility for ISE 2.0 and haven't seen the answer to this. For the WLC 5508, the minimum AirOS is 7.0.116.0 but it has limited AAA authentication and guest support. The recommended version of AirOS is 8.0.121.0.
http://www.cisco.com/c/en/us/td/docs/security/ise/2-0/compatibility/ise_sdt.html
What about AirOS 7.6.130.0? I know that release of AirOS works with 1.3 and 1.4 even though they show the same release support as 2.0. I am just concerned that something may have changed with 2.0. I'm only concerned about AAA authentication and guest access. No BYOD, posture, or MDM is required.
