Dear bird developers, Netlink support was added to FreeBSD recently [1]. It’s not as “full-featured” as its Linux counterpart yet, however the added subset is enough to make a routing daemon work. Specifically, it supports multiple tables, multipath, nexthops and nexthops groups. No MPLS support yet. It aims to be compatible (whenever possible) to minimise the netlink users adoption efforts. The first FreeBSD releases to have netlink support will be 14.0 and 13.2. Both are planned to be released in ~Q1 2023. The attached change adds 'bsd-netlink’ sysconf target, allowing to build both netlink & rtsock versions on FreeBSD. Example output: bird> show status BIRD 2.0.10-124-g8e63db05 Router ID is 10.0.0.4 Hostname is devel2.ipfw.ru Current server time is 2022-12-01 13:40:08.960 Last reboot on 2022-12-01 13:35:39.293 Last reconfiguration on 2022-12-01 13:37:20.593 Daemon is up and running bird> show interfaces vtnet0 up (index=1) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 10.0.0.4/24 (Preferred, scope site) fe80::5054:ff:fe14:e319/64 (Preferred, scope link) 2a01:4f9:3a:fa00:5054:ff:fe14:e319/64 (Preferred, scope univ) lo0 up (index=2) MultiAccess Multicast AdminUp LinkUp Loopback Ignored MTU=16384 127.0.0.1/8 (Preferred, scope host) ::1/128 (Preferred, scope host) fe80::1/64 (Preferred, scope link) vtnet0.2 up (index=3) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 fe80::5054:ff:fe14:e319/64 (Preferred, scope link) bird> show route protocol ospf2 Table master4: 7.7.7.0/24 unicast [ospf2 13:39:41.717] * E2 (150/10/10000) [10.0.0.157] via 10.0.0.2 on vtnet0 10.0.0.0/24 unicast [ospf2 13:37:26.734] I (150/10) [10.0.0.4] dev vtnet0 bird> show route protocol static2 Table master4: 10.1.0.0/24 unicast [static2 13:46:16.543] * (200) via 10.0.0.6 on vtnet0 weight 4 via 10.0.0.5 on vtnet0 weight 3 [1] https://github.com/freebsd/freebsd-src/commit/7e5bf68495cc0a8c9793a338a8a020...