Cisco Modeling Labs 2.7
As of Cisco Modeling Labs (CML) version 2.7, the standard IOS-XRv image has limited support and fewer features compared to the newer IOS-XRv 9000 image, which is the preferred option for IOS XR simulations in CML. The IOS-XRv image is not included in the refplat ISO and the only option available after a fresh CML 2.7 install is XRV9K.
The IOS-XRv 9000 image includes more robust MPLS and VRF capabilities, such as successful L3 MPLS VPN implementations, making it a better choice for complex routing scenarios. However, the IOS-XRv image itself remains available with limitations, including a lack of L2 MPLS VPN support in certain scenarios.
XRv vs XRv9K resources
The only challenge with the IOS-XRv 9000 image is that it requires slightly more resources than the IOS-XRv image.