Please check the following information:
Network-Based Application Recognition and Distributed Network-Based Application Recognition.
The following table lists the platforms that support NBAR and the Cisco IOS releases where support for the platform was introduced:
Table 6
Platform
Initial Cisco IOS Release Support
Cisco 1700
Cisco IOS Release 12.2(2)T
Cisco 2600
Cisco IOS Release 12.1(5)T
Cisco 3600
Cisco IOS Release 12.1(5)T
Cisco 3700
Cisco IOS Release 12.2(8)T
Cisco 7100
Cisco IOS Release 12.0(5)XE2
Cisco IOS Release 12.1(5)T
Cisco 7100 UBR
Cisco IOS Release 12.1(10)EC
Cisco 7200
Cisco IOS Release 12.0(5)XE2
Cisco IOS Release 12.1(5)T
Cisco 7200 UBR
Cisco IOS Release 12.1(10)EC
Cisco 7500 with VIP
Cisco IOS Release 12.1(6)E
Cisco IOS Release 12.2(4)T3
Catalyst 6000 family switch with a FlexWAN module
Cisco IOS Release 12.1(6)E
https://csone.my.salesforce.com/ui/support/servicedesk/ServiceDeskPage#
It means that the Nbar is not supported in wired traffic, however this other guide says that NBAR2 is supported in the wireless network:
Cisco Catalyst 4500E Supervisor Engine 8-E Configuration Guide (Wireless), Cisco IOS XE Release 3.7E
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-7-0E/wireless/configuration-guide/b_37e_4500sup8e_cg/b_37e_4500sup8e_cg_chapter_01001000.html
