The value of vRtrIfuRPFCheckMode specifies the mode of unicast RPF check. In 'strict' mode, uRPF checks whether incoming packet has a source address that matches a prefix in the routing table, and whether the interface expects to receive a packet with this source address prefix. In 'loose' mode, uRPF checks whether incoming packet has source address with a corresponding prefix in the routing table, however 'loose' mode does not check whether the interface expects to receive a packet with a specific source address prefix. In 'strictNoEcmp' mode, when a packet is received on an interface and the source address matches an ECMP route the packet is dropped by uRPF. If source address does not match an ECMP route, the behavior is same as 'strict' mode. This object is valid only when value of vRtrIfuRPFCheckState is set to 'enabled'.