Manually-set IPv6 default route disappears after 5 minutes
I am renting a “Kimsufi” server over at OVH. I installed OpenBSD on it
as per  by installing it locally in a VM, then `nc |dd`ing it to the
hard disk. It works .
Now, I'm setting up networking properly, and have troubles with IPv6. It
seems they do not have router advertisements going on that network, so
rtsol is of no use. I therefore set my local IP address manually, based
on the configuration of the FreeBSD that was initially installed there.
Another oddity is that the default gateway is not actually within the
/64 (as per their FreeBSD configuration again) prefix of my interface.
To be able to ping that router, I had to reduce that prefix to a /56. I
could then add that gateway as the default route
All in all, I ended up with this /etc/hostname.sis0