Hi, does anybody know something about the behavior observed ? Regards, Alex -------- Original-Nachricht -------- Betreff: BGP session closed after receipt of flowspec route without destination prefix Datum: Fri, 24 Jan 2020 21:33:17 +0100 Von: Alex D. <listensammler@gmx.de> An: bird-users@network.cz Hi, i configured the following flowspec route on a Juniper router: route v6test { match { source 2a02:xxxx:xxxx:xxxx::1/128; } then discard; } The route was accepted on my Juniper router and blocked all traffic from src ip 2a02:xxxx:xxxx:xxxx::1 as expected. After advertising the route, BIRD closed the BGP session. Is this an expected behaviour, means does is it necessary, that a dst prefix for a flowspec route must exist ? Log: 2020-01-24 09:52:26.750 <RMT> vs_dis_r1_6838: No dst prefix at first pos 2020-01-24 09:52:26.750 <RMT> vs_dis_r1_6838: Error: Malformed attribute list 2020-01-24 09:52:26.750 <TRACE> vs_dis_r1_6838: BGP session closed BIRD accepted the route after changing to: route v6test { match { destination ::/0; source 2a02:xxxx:xxxx:xxxx::1/128; } then discard; } Regards, Alex