This MIB contains information related to Virtual 
        Routing and Forwarding (VRF).
        
        VRF is a mechanism by which a single device can provide
        independent routing instances. This allows customers to 
        virtually isolate network traffic, and also use overlapping
        IP addresses.
        
        Layer3 or routed interfaces in the system will belong to
        one VRF at a time. The datapath forwarding logic uses the
        VRF membership of the input interface to determine a
        specific forwarding table to use for routing the traffic.
        
        VRF can also be used to isolate management traffic from
        the rest of the data plane traffic.
        
        This MIB module provides the following pieces of
        information:
            * A table of all VRFs configured in the system
            * A table that contains the VRF membership information
            for all routed interfaces in the system by sparsely
            augmenting the ifTable.