Hi, ospf6d does not like beeing reloaded and exits.
Below an example on -current running in VMM. I first noticed it on an OpenBSD 6.0 amd64 router on real hardware. Remi r1# ifconfig -A lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 32768 index 3 priority 0 llprio 3 groups: lo inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 inet 127.0.0.1 netmask 0xff000000 vio0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500 lladdr fe:e1:bb:d1:10:e1 index 1 priority 0 llprio 3 groups: egress media: Ethernet autoselect status: active inet 192.168.250.101 netmask 0xffffff00 broadcast 192.168.250.255 inet6 fe80::fce1:bbff:fed1:10e1%vio0 prefixlen 64 scopeid 0x1 inet6 2001:db8::101 prefixlen 64 enc0: flags=0<> index 2 priority 0 llprio 3 groups: enc status: active vether0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 lladdr fe:e1:ba:d0:08:cf index 5 priority 0 llprio 3 groups: vether media: Ethernet autoselect status: active inet6 fe80::fce1:baff:fed0:8cf%vether0 prefixlen 64 scopeid 0x5 inet6 2001:db8:a::101 prefixlen 64 r1# r1# sysctl net.inet6.ip6.forwarding net.inet6.ip6.forwarding=1 r1# r1# cat /etc/ospf6d.conf router-id 192.168.250.101 area 0.0.0.0 { interface vio0 interface vether0 { passive } } r1# r1# r1# ospf6d -dv if_newaddr: ifindex 3, addr fe80::1/64, dest :: if_newaddr: ifindex 1, addr fe80::fce1:bbff:fed1:10e1/64 if_newaddr: ifindex 1, addr 2001:db8::101/64 if_newaddr: ifindex 5, addr fe80::fce1:baff:fed0:8cf/64 if_newaddr: ifindex 5, addr 2001:db8:a::101/64 startup if_set_ipv6_checksum setting cksum offset to 12 orig_rtr_lsa: area 0.0.0.0 if_fsm: event UP resulted in action START and changing state for interface vether0 from DOWN to DOWN if_join_group: interface vio0 addr ff02::5 orig_rtr_lsa: area 0.0.0.0 orig_link_lsa: interface vio0 if_fsm: event UP resulted in action START and changing state for interface vio0 from DOWN to WAIT orig_intra_lsa_net: area 0.0.0.0, interface vether0 orig_intra_lsa_net: area 0.0.0.0, interface vio0 orig_intra_lsa_rtr: area 0.0.0.0, interface vether0: 2001:db8:a::101/64 spf_calc: area 0.0.0.0 calculated *(192.168.250.101, 0x2001, 0.0.0.0) cost 0 has nexthops [] nbr_fsm: event HELLO_RECEIVED resulted in action START_INACTIVITY_TIMER and changing state for neighbor ID 192.168.250.102 from DOWN to INIT nbr_fsm: event 2_WAY_RECEIVED resulted in action EVAL and changing state for neighbor ID 192.168.250.102 from INIT to 2-WAY if_act_elect: interface vio0 old dr none new dr 192.168.250.102, old bdr none new bdr 192.168.250.101 if_join_group: interface vio0 addr ff02::6 nbr_fsm: event ADJ_OK resulted in action EVAL and changing state for neighbor ID 192.168.250.102 from 2-WAY to EXSTA orig_rtr_lsa: area 0.0.0.0 orig_rtr_lsa: area 0.0.0.0 orig_link_lsa: interface vio0 orig_link_lsa: link local address fe80::fce1:bbff:fed1:10e1 orig_link_lsa: prefix 2001:db8:: if_fsm: event BACKUPSEEN resulted in action ELECT and changing state for interface vio0 from WAIT to BCKUP if_act_elect: interface vio0 old dr 192.168.250.102 new dr 192.168.250.102, old bdr 192.168.250.101 new bdr 192.168.250.101 if_fsm: event NEIGHBORCHANGE resulted in action ELECT and changing state for interface vio0 from BCKUP to BCKUP orig_intra_lsa_net: area 0.0.0.0, interface vether0 orig_intra_lsa_net: area 0.0.0.0, interface vio0 orig_intra_lsa_rtr: area 0.0.0.0, interface vether0: 2001:db8:a::101/64 orig_intra_lsa_net: area 0.0.0.0, interface vether0 orig_intra_lsa_net: area 0.0.0.0, interface vio0 orig_intra_lsa_rtr: area 0.0.0.0, interface vether0: 2001:db8:a::101/64 orig_intra_lsa_rtr: area 0.0.0.0, interface vio0: 2001:db8::101/64 nbr_fsm: event NEGOTIATION_DONE resulted in action SNAPSHOT and changing state for neighbor ID 192.168.250.102 from EXSTA to SNAP nbr_fsm: event SNAPSHOT_DONE resulted in action SNAPSHOT_DONE and changing state for neighbor ID 192.168.250.102 from SNAP to EXCHG nbr_fsm: event EXCHANGE_DONE resulted in action EXCHANGE_DONE and changing state for neighbor ID 192.168.250.102 from EXCHG to LOAD spf_calc: area 0.0.0.0 calculated *(192.168.250.101, 0x2001, 0.0.0.0) cost 0 has nexthops [] (192.168.250.102, 0x2001, 0.0.0.0) cost 16777215 has nexthops [] ospf6d: rt_calc: Intra-Area-Prefix LSA (192.168.250.102, 1) references non-existent Network LSA (192.168.250.102, 1) orig_intra_lsa_net: area 0.0.0.0, interface vether0 orig_intra_lsa_net: area 0.0.0.0, interface vio0 orig_intra_lsa_rtr: area 0.0.0.0, interface vether0: 2001:db8:a::101/64 orig_intra_lsa_rtr: area 0.0.0.0, interface vio0: 2001:db8::101/64 orig_rtr_lsa: area 0.0.0.0 orig_rtr_lsa: transit net, interface vio0 nbr_fsm: event LOADING_DONE resulted in action NOTHING and changing state for neighbor ID 192.168.250.102 from LOAD to FULL orig_intra_lsa_net: area 0.0.0.0, interface vether0 orig_intra_lsa_net: area 0.0.0.0, interface vio0 orig_intra_lsa_rtr: area 0.0.0.0, interface vether0: 2001:db8:a::101/64 spf_calc: area 0.0.0.0 calculated *(192.168.250.101, 0x2001, 0.0.0.0) cost 0 has nexthops [] (192.168.250.102, 0x2001, 0.0.0.0) cost 10 has nexthops [fe80::fce1:bbff:fed1:4cfb%vio0] (192.168.250.102, 0x2002, 0.0.0.1) cost 10 has nexthops [::%vio0] if_fsm: event WAITTIMER resulted in action NOTHING and changing state for interface vio0 from BCKUP to BCKUP [ on another console: ospf6ctl reload ] if_del: interface vether0 if_del: interface vio0 configuration reloaded merge_interfaces: proc 2 area 0.0.0.0 removing interface vether0 if_del: interface vether0 merge_interfaces: proc 2 area 0.0.0.0 removing interface vio0 if_del: interface vio0 merge_interfaces: proc 1 area 0.0.0.0 removing interface vether0 orig_rtr_lsa: area 0.0.0.0 orig_rtr_lsa: transit net, interface vio0 if_fsm: event DOWN resulted in action RESET and changing state for interface vether0 from DOWN to DOWN if_del: interface vether0 merge_interfaces: proc 1 area 0.0.0.0 removing interface vio0 if_leave_group: interface vio0 addr ff02::5 if_leave_group: interface vio0 addr ff02::6 orig_rtr_lsa: area 0.0.0.0 if_act_elect: interface vio0 old dr 192.168.250.102 new dr 192.168.250.101, old bdr 192.168.250.101 new bdr none orig_rtr_lsa: area 0.0.0.0 orig_rtr_lsa: area 0.0.0.0 orig_link_lsa: interface vio0 orig_link_lsa: link local address fe80::fce1:bbff:fed1:10e1 orig_link_lsa: prefix 2001:db8:: if_fsm: event NEIGHBORCHANGE resulted in action ELECT and changing state for interface vio0 from BCKUP to DR nbr_fsm: event KILL_NBR resulted in action DELETE and changing state for neighbor ID 192.168.250.102 from FULL to DOWN orig_rtr_lsa: area 0.0.0.0 orig_link_lsa: interface vio0 if_fsm: event DOWN resulted in action RESET and changing state for interface vio0 from BCKUP to DOWN if_del: interface vio0 fatal in rde: interface lost area kernel routing table decoupled waiting for children to terminate ospf engine exiting terminating r1# OpenBSD 6.1-beta (GENERIC.MP) #217: Wed Mar 8 11:31:33 MST 2017 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 251658240 (240MB) avail mem = 239484928 (228MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0 acpi at bios0 not configured cpu0 at mainbus0: (uniprocessor) cpu0: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2199.29 MHz cpu0: FPU,VME,DE,PSE,MSR,PAE,MCE,CX8,SEP,PGE,MCA,CMOV,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,RDSEED,ADX,SMAP cpu0: smt 0, core 0, package 0 pvbus0 at mainbus0: OpenBSD pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "OpenBSD VMM PCI Host Bridge" rev 0x00 virtio0 at pci0 dev 1 function 0 "Qumranet Virtio RNG" rev 0x00 viornd0 at virtio0 virtio0: irq 3 virtio1 at pci0 dev 2 function 0 "Qumranet Virtio Storage" rev 0x00 vioblk0 at virtio1 scsibus1 at vioblk0: 2 targets sd0 at scsibus1 targ 0 lun 0: <VirtIO, Block Device, > SCSI3 0/direct fixed sd0: 512MB, 512 bytes/sector, 1048576 sectors virtio1: irq 5 virtio2 at pci0 dev 3 function 0 "Qumranet Virtio Network" rev 0x00 vio0 at virtio2: address fe:e1:bb:d1:10:e1 virtio2: irq 7 virtio3 at pci0 dev 4 function 0 "OpenBSD VMM Control Interface" rev 0x00 vmmci0 at virtio3 virtio3: irq 9 isa0 at mainbus0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns8250, no fifo com0: console vmm at mainbus0 not configured vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on sd0a (f601f5d1ff11daae.a) swap on sd0b dump on sd0b