Ericsson Huawei Huawei Dell Dell Juniper Networks Linkedin This document defines an information model associated with the I2RS ephemeral state for filter-based routing of IP packets via a Filter- based Routing Information Base (FB-RIB). FB-RIBs (ephemeral and non- ephemeral) are associated with specific interfaces interfaces on a routing device, and process packets received on these interfaces according a filtering policy. A filtering policy is a a minimalistic event-match_condition-action (ECA) policy with only one event - the reception of a frame/packet of data on an interface. The match conditions in the filter policy are n-tuple matches based on the content of the frame/packet or the time of its arrival. Filter-based policy allows actions which modifying the frame/packet, forward the frame or packet, or drop the frame/packet. Filter-Based Policy in FB-RIBs engages before any destination based routing so the FB-RIBs provide a destination-based default RIB that will be used if none of the filters are matched.