Re: IPv6 static config in /etc/network/interfaces ignored

[Pascal Hambourg <pascal@plouf.fr.eu.org>]

Le 27/01/2019 à 16:29, Claudio M a écrit :
> > auto eth0
> > iface eth0 inet static
> >    address a.b.c.d
> >    netmask 255.255.255.224
> >    gateway c.d.e.f
> >    up route add -net a.b.c.x netmask 255.255.255.224 gw c.d.e.x dev eth0

AFAIK, the gateway must be directly reachable on eth0. But c.d.e.x does 
not seem to belong to a.b.c.d/255.255.255.224.

> >    up ip addr add f.g.h.i/32 dev eth0
> >    down ip addr del  f.g.h.i /32 dev eth0

Hackish. You can create a second inet stanza instead.

> >    post-up /etc/network/iptables.sh

Is there a chance that this script returns a non zero value ?

> > iface eth0 inet6 static
> >    address 2a01:xxxx:xxxx:xxxx::2
> >    netmask 64
> >    gateway fe80::1

What is the output of

 service networking status

Did you try to swap the inet and inet6 stanzas ?