So I had a bit of a hard time configuring networking on my server: My network environment requires me to configure a gateway outside the subnet. This worked fine for IPv4 by adding two entries to /etc/route.conf, one route to the gateway and one default route via the gateway. However, for IPv6 it does not seem to work. Attempting to open an IPv6 connection results in "sendmsg: Network is down". See the details of my configuration and the errors below.
I am aware of IPv6 router advertisements and stateless auto-configuration, but I have my reasons for not using that. -bash-5.0$ cat /etc/ifconfig.vioif0 up inet 195.39.247.17 netmask 255.255.255.255 inet6 2a0f:4ac0::17 prefixlen 128 alias -bash-5.0$ cat /etc/route.conf inet 195.39.247.8 -static -link -iface vioif0 inet default 195.39.247.8 inet6 2a0f:4ac0::8 -static -link -iface vioif0 inet6 default 2a0f:4ac0::8 -bash-5.0$ /sbin/ping6 petabyte.dev PING6(56=40+8+8 bytes) 2a0f:4ac0::17 --> 2a0f:4ac0::4 ping6: sendmsg: Network is down ping6: wrote petabyte.dev 16 chars, ret=-1 ping6: sendmsg: Network is down ping6: wrote petabyte.dev 16 chars, ret=-1 ^C --- petabyte.dev ping6 statistics --- 2 packets transmitted, 0 packets received, 100.0% packet loss -bash-5.0$ /sbin/ifconfig vioif0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ec_capabilities=0x1<VLAN_MTU> ec_enabled=0 address: 52:54:00:d6:7a:24 inet 195.39.247.17/32 broadcast 195.39.247.17 flags 0 inet6 fe80::5054:ff:fed6:7a24%vioif0/64 flags 0 scopeid 0x1 inet6 2a0f:4ac0::17/128 flags 0 lo0: flags=0x8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33624 inet 127.0.0.1/8 flags 0 inet6 ::1/128 flags 0x20<NODAD> inet6 fe80::1%lo0/64 flags 0 scopeid 0x2 -bash-5.0$ /sbin/route show Routing tables Internet: Destination Gateway Flags Refs Use Mtu Interface default osmium UGS - - - vioif0 127/8 localhost UGRS - - 33624 lo0 localhost lo0 UHl - - 33624 lo0 osmium 76:69:6f:69:66:30 UHS - - - vioif0 amethyst link#1 UHl - - - lo0 195.39.247.17/32 link#1 UC - - - vioif0 osmium 52:54:00:ea:f5:eb UHL - - - vioif0 Internet6: Destination Gateway Flags Refs Use Mtu Interface ::/104 localhost UGRS - - 33624 lo0 ::/96 localhost UGRS - - 33624 lo0 default osmium.petabyte.de UGS - - - vioif0 localhost lo0 UHl - - 33624 lo0 ::127.0.0.0/104 localhost UGRS - - 33624 lo0 ::224.0.0.0/100 localhost UGRS - - 33624 lo0 ::255.0.0.0/104 localhost UGRS - - 33624 lo0 ::ffff:0.0.0.0/96 localhost UGRS - - 33624 lo0 2001:db8::/32 localhost UGRS - - 33624 lo0 2002::/24 localhost UGRS - - 33624 lo0 2002:7f00::/24 localhost UGRS - - 33624 lo0 2002:e000::/20 localhost UGRS - - 33624 lo0 2002:ff00::/24 localhost UGRS - - 33624 lo0 osmium.petabyte.de 76:69:6f:69:66:30 UHS - - - vioif0 amethyst.petabyte. link#1 UHl - - - lo0 fe80::/10 localhost UGRS - - 33624 lo0 fe80::%vioif0/64 link#1 UC - - - vioif0 fe80::5054:ff:fed6 link#1 UHl - - - lo0 fe80::%lo0/64 fe80::1 U - - - lo0 fe80::1 lo0 UHl - - - lo0 ff01:1::/32 link#1 UC - - - vioif0 ff01:2::/32 localhost UC - - 33624 lo0 ff02::%vioif0/32 link#1 UC - - - vioif0 ff02::%lo0/32 localhost UC - - 33624 lo0 fe80::5054:ff:feea 52:54:00:ea:f5:eb UHL - - - vioif0 -bash-5.0$
