Abstract: An apparatus configured to route packets over networks may be configured to determine whether a packet is valid prior to routing a received packet. The apparatus may receive the packet on one of a plurality of interfaces. The apparatus may identify the interface on which the packet is received and also a source of the packet. Additionally, the apparatus may access a bundle of acceptable interfaces on which a packet from the source may be received. The number of acceptable interfaces may be greater than a single interface, but less that all of the interfaces of the apparatus configured to receive packets from over the networks. If the interface on which the packet is received is an acceptable interface identified by the bundle, then the packet is valid and routed to a next location. Otherwise, the packet is determined to be invalid and dropped.

Abstract: An apparatus configured to route packets over networks may be configured to determine whether a packet is valid prior to routing a received packet. The apparatus may receive the packet on one of a plurality of interfaces. The apparatus may identify the interface on which the packet is received and also a source of the packet. Additionally, the apparatus may access a bundle of acceptable interfaces on which a packet from the source may be received. The number of acceptable interfaces may be greater than a single interface, but less that all of the interfaces of the apparatus configured to receive packets from over the networks. If the interface on which the packet is received is an acceptable interface identified by the bundle, then the packet is valid and routed to a next location. Otherwise, the packet is determined to be invalid and dropped.