Currenty our SSID profile is allowing mixed authentication of wpa-aes, wpa-tkip, wpa2-aes and wpa2-tkip. Most of my clients are authenticating using wpa2-aes or wpa2-tkip.
However, today we changed the 802.11 security to allow wpa2-aes and wpa2-tkip only. All of a sudden all of my client machines, which were authenticatiing using wpa2-aes, or wpa2-tkip can no longer connect. If we change the settings back to mixed all of my wpa2 users can connect once again.
So why, when we have network authentication set to wpa2-aes, wpa2-tkip, do my clients fail?