The value of vRtrIfIpv6uRPFCheckMode specifies the mode of unicast RPF check. By default the value of vRtrIfIpv6uRPFCheckMode is 'strict (1)',which means that uRPF checks whether the 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. When the value of vRtrIfIpv6uRPFCheckMode is 'loose (2)', the uRPF checks whether the incoming packet has a source address with a corresponding prefix in the routing table. It does not check whether the interface expects to receive a packet with a specific source address prefix. When the value of vRtrIfIpv6uRPFCheckMode is 'strictNoEcmp (3)', the uRPF checks whether the incoming packet has a source address which matches an ECMP route. If the source address matches an ECMP route, the packet is dropped by uRPF. Otherwise, the behavior is same as 'strict' mode. This object is valid only when value of vRtrIfIpv6uRPFCheckState is set to 'enabled'.