Repackers modify Cisco images for several reasons, all of which breach Cisco’s EULA:
Robust support for NETCONF, RESTCONF, and Python scripting within the IOS XE shell. Common Use Cases Csr1000v-ucmk9.16.12.1b-serial.qcow2 REPACK
If you need CSR1000v version 16.12.1b for learning or testing, there are legitimate alternatives. Repackers modify Cisco images for several reasons, all
Allows users to save the exact state of a router and revert to it if a configuration breaks. Csr1000v-ucmk9.16.12.1b-serial.qcow2 REPACK
Using a pre-converted qcow2 "repack" saves the engineer the tedious process of installing the router from scratch via an ISO, making it a convenient "plug-and-play" solution for study labs.