This read-create Unsigned32 object links a row in the VRF list table back to a specific VRF by holding the value of that VRF's index (cvVrfIndex) in the main VRF table. An administrator uses VRF lists to group multiple VRFs together, and this object is what ties a particular list entry to the exact VRF it represents. Note that once the list entry's row becomes active, this VRF association can no longer be changed, so an admin building a list of VRFs to bundle onto a trunk interface must get the index right before activating the row.