In what case need to set auth_type to AUTH_NETWORK_EAP in Linux platform with MSD45N?

The auth type of Network EAP is an 802.11 auth type that Cisco defined that basically indicates that open 802.11 authentication and association will be followed by EAP authentication. The possible 802.11 auth types Laird support are open (0x0), shared (0x1) or Network EAP (0x80). With Cisco autonomous access points, it is possible to configure an SSID where only an 802.11 auth type of Network EAP is allowed, but this configuration is discouraged by Cisco and they indicate that if Network EAP is configured on the infrastructure, Open authentication with EAP should also be configured on that same network. Network EAP is rarely used by anyone at this point, and Cisco always recommends that it never be the only 802.11 auth type configured on the infrastructure. Either Open or Network EAP can be used with LEAP or any enterprise EAP authentication type. The only time Network EAP must be used is if that is the only 802.11 auth type that is configured on the infrastructure, but it would be rare that anyone would configure the network in that way.