The Xrv9k-fullk9-7.2.2 image offers a wide range of features, including:
You might ask: "Why not use the latest 7.10.x or 8.x?" Xrv9k-fullk9-7.2.2
The answer is Stability and Resource efficiency.
Newer versions of IOS XR require significantly more virtualization overhead (some require 32GB+ RAM just to boot the RP). Xrv9k-fullk9-7.2.2 remains the "Ubuntu 18.04 LTS" of XRv9k images. It is: The Xrv9k-fullk9-7
Xrv9k-fullk9-7.2.2 is a Cisco IOS-XR software release identifier for the XRv9k virtual router platform with the “fullk9” feature pack (cryptography enabled). This release targets service-provider and large-scale datacenter routing use cases on virtualized infrastructure. Hardware Settings: