The Cisco IOS XE Denali 16.2.1 has been retired and is no longer supported.
End-of-Sale Date: 2016-10-11
End-of-Support Date: 2021-10-31
Cisco's End-of-Life Policy
You can view a listing of available Cisco IOS XE offerings that best meet your specific needs
If you want support information for the Cisco IOS XE Denali 16.2.1 documentation, it may be available through Cisco.com Search or in the Cisco Community