Re: IPv6 static gateway IP problem

Filip Lax wrote on 06.06.2026 23:26:
> Hi I have a VPS with provider that give static IP6 without DHCP. I don't understand how should set it up, nothing I try work, The provider show this info:
> 
> IP address:   2a03:118e:202:55::
> Subnet:       2a03:118e:202::/64
> Gateway:      2a03:118e:202::1
> 
> (I alter some numbers +/- just for anonmity but format is still correct)
> 
> I don't know how to set this Gateway because OpenBSD say "Network is unreachable":
> 
> # ifconfig vio0 inet6 2a03:118e:202:55:: prefixlen 64
> # route add -inet6 default 2a03:118e:202::1
> add net default: gateway 2a03:118e:202::1: Network is unreachable

You have to add the gateway first, an example can be found in the 
route(8) manpage: https://man.openbsd.org/route#EXAMPLES :

"Add a static inet6(4) route to a host which is on the vio0 interface 
that is outside your prefix, and use that host as a default gateway, as 
used by some hosting providers:

# route add -inet6 2001:db8:efef::1 -cloning -link -iface vio0
# route add -inet6 default 2001:db8:efef::1"

> 
> I test also autoconf6 and see slaacd get RA, And it put fe80:etc:etc%vio0 route as default. I have disabled PF to be sure, and also tried with single rule: "pass all". Still no IP6 traffic in or out.
> 
> So I install Linux to the VPS to test IP6 there - it's normal and works good. It has static setup with "netplan". Here is "ip -6 a" and "ip -6 route show" from Linux:
> 
>      inet6 2a03:118e:202:55::/64 scope global
>         valid_lft forever preferred_lft forever
>      inet6 fe80::6e21:94ff:fe7a:c358/64 scope link proto kernel_ll
>         valid_lft forever preferred_lft forever
> 
> 2a03:118e:202:55::/64 dev eth0 proto kernel metric 256 pref medium
> fe80::/64 dev eth0 proto kernel metric 256 pref medium
> default via 2a03:118e:202::1: dev eth0 proto static metric 1024 onlink pref medium
> default nhid 1211265837 via fe80::5:73ff:fea0:72 dev eth0 proto ra metric 1024 expires 1685sec pref medium
> 
> Sorry for linux copy/paste. How can I replicate this for OpenBSD so my IP6 will work?
>