Summit x620 switches, when stacked and running EXOS 22.x, will allow user creation of VRs (Virtual Routers). User-created VRs are not supported in this hardware, and attempts to add ports to a VLAN under a user-created VR will result in the following error message:
Error: Port 1:1 doesn't support virtual routers. Can not be added to user VR.
Configuration failed on backup Node, command execution aborted!