NBAR2 Protocol Packs are available for download on the Cisco software download page (https://software.cisco.com/download/home). On the download page, specify a platform model to display software available for download. One software option will be
NBAR2 Protocol Packs.
To display Protocol Packs available for the Cisco ASR 1001 platform, enter "ASR 1001 Router" in the search field.
You can also enter a platform series, such as "ASR 1000 Series," and then select a model from the results.