Hello, I'm running 2.0.7 on Linux 5.4.18-0-lts (Alpine) and I receive the route 193.228.143.0/24 from 2a0a:e5c0:1:9::2. However it is never set into the kernel, with the error message "Netlink: Network unreachable" in syslog. Has anyone seen this problem recently? I'm not sure if this is really a bird2 problem or not, to be honest: The kernel reports many messages like this in dmesg: [4541983.369058] netlink: 'bird': attribute type 5 has an invalid length. However, I am also puzzled that manually adding the route seems to fail: [14:44] router1.place6:/var/log# ip route add 193.228.143.0/24 via inet6 2a0a:e5c0:1:9::2 RTNETLINK answers: Invalid argument [14:45] router1.place6:/var/log# ip route add 193.228.143.0/24 nexthop via inet6 2a0a:e5c0:1:9::2 RTNETLINK answers: Invalid argument [14:45] router1.place6:/var/log# ip route add 193.228.143.0/24 nexthop via inet6 2a0a:e5c0:1:9::2 dev bond0.25 RTNETLINK answers: Invalid argument [14:45] router1.place6:/var/log# bird status: bird> show route all protocol bluecmd_v6 Table master4: 193.228.143.0/24 unicast [bluecmd_v6 14:31:15.880] ! (100) [AS206858i] via 2a0a:e5c0:1:9::2 on bond0.25 Type: BGP univ BGP.origin: IGP BGP.as_path: 206858 BGP.next_hop: 2a0a:e5c0:1:9::2 BGP.local_pref: 100 Table master6: 2a10:11c0:114::/48 unicast [bluecmd_v6 14:31:15.880] * (100) [AS206858?] via 2a0a:e5c0:1:9::2 on bond0.25 Type: BGP univ BGP.origin: Incomplete BGP.as_path: 206858 BGP.next_hop: 2a0a:e5c0:1:9::2 fe80::21c:73ff:fe2c:6eca BGP.local_pref: 100 bird> bird2 config: protocol bgp bluecmd_v6 { local as 209898; neighbor 2a0a:e5c0:1:9::2 as 206858; direct; ipv4 { extended next hop; import filter from_inside_customer; export filter only_default_route; }; ipv6 { import filter from_inside_customer; export filter only_default_route; }; default bgp_local_pref pref_normal; } syslog: Apr 1 14:31:15 router1 daemon.warn bird: Netlink: Network unreachable Apr 1 14:31:22 router1 daemon.warn bird: Netlink: Network unreachable Apr 1 14:31:42 router1 daemon.warn bird: Netlink: Network unreachable ... Bird / Kernel / etc.: [14:33] router1.place6:/var/log# bird --version BIRD version 2.0.7 [14:35] router1.place6:/var/log# uname -a Linux router1 5.4.18-0-lts #1-Alpine SMP Thu, 06 Feb 2020 09:27:36 UTC x86_64 GNU/Linux [14:36] router1.place6:/var/log# For reference is also attached the configuration of the opposite side (Arista 7050): router bgp 206858 vrf PUBLIC router-id 193.228.143.0 neighbor 2a0a:e5c0:1:9::5 remote-as 209898 neighbor 2a0a:e5c0:1:9::5 next-hop-self neighbor 2a0a:e5c0:1:9::5 maximum-routes 0 ! address-family ipv4 bgp next-hop address-family ipv6 neighbor 2a0a:e5c0:1:9::5 activate neighbor 2a0a:e5c0:1:9::5 next-hop address-family ipv6 originate network 193.228.143.0/24 ! address-family ipv6 neighbor 2a0a:e5c0:1:9::5 activate network 2a10:11c0:114::/48 linthal-core(vrf:PUBLIC)(config-router-bgp-vrf-PUBLIC)#show ipv6 bgp neighbors 2a0a:e5c0:1:9::5 advertised-routes detail BGP routing table information for VRF PUBLIC Router identifier 193.228.143.0, local AS number 206858 Update wait-install is disabled BGP routing table entry for 2a10:11c0:114::/48 Paths: 1 available 206858 2a0a:e5c0:1:9::2 from - (193.228.143.0) Origin INCOMPLETE, metric -, localpref -, weight -, valid, local, best Rx SAFI: Unicast BGP routing table entry for 193.228.143.0/24 Paths: 1 available 206858 - from - (193.228.143.0) Origin IGP, metric -, localpref -, weight -, valid, local, best Rx SAFI: Unicast Any pointer in the right direction would be appreciated! Cheers, Nico -- Modern, affordable, Swiss Virtual Machines. Visit www.datacenterlight.ch