Route aggregation in BIRD - how?

Hello. Case study: * importing full BGP table from various uplinks * some routes received by BGP are being exported via OSPF to core1, using filters: (source = RTS_BGP && bgp_path ~ [= * ASNXYZ * =]) Question: how to aggregate routes (whenever possible) before exporting them via OSPF to core? Example: lets say that I've received a.b.c.d/22 and a.b.c.d/24 from asnXYZ via BGP. Lets say that I want to export routes with asnXYZ in aspath via ospf to core1 switch. Obviously, a.b.c.d/24 is in a.b.c.d/22, so I would like to export only a.b.c.d/22. Is it doable in bird? If yes, any hint/keywords in doc? -- * Maciej Wierzbicki * At paranoia's poison door * * VOO1-RIPE *