networkd: get ipv6 slaac address only at boot despite IPv6AcceptRA=false

[BRINER Cédric <cedric.briner@unige.ch>]

systemd 232
debian stretch 9.1

Hi,

I configure my ip stack with systemd-networkd. I do have a dual stack
(v4 and v6). There is a router advertisement on fd69:620:600:b00:: and
on 2001:620:600:b00:: and the ipv6 choosed is on a other network
fd69:620:600:11::

The problem is that my ip configuration differs between the one I get
after a reboot and the one I get after a "systemctl restart
systemd-networkd".

Do you have any idea what the problem could be or what to do to
troubleshoot it ?

Regards.

cED


------------------

The config is:
[Match]
Name=ens192

[Network]
DHCP=no

Address=10.194.11.42/24
Gateway=10.194.11.1

IPv6AcceptRA=false
Address=fd69:620:600:11:250:56ff:feb6:26b9/64
Gateway=fd69:620:600:11::1

Domains=unige.ch

DNS=2001:620:600:4::6
DNS=2001:620:4::32
DNS=2001:620:600:8::7



When I do a systemctl restart systemd-network, the setup does not show
any ip with the …:b00:: subnet.
# networkctl status
●        State: routable
       Address: 10.194.11.42 on ens192
                fd69:620:600:11:250:56ff:feb6:26b9 on ens192
                fe80::250:56ff:feb6:26b9 on ens192
       Gateway: 10.194.11.1 (Cisco Systems, Inc) on ens192
                fd69:620:600:11::1 (Cisco Systems, Inc) on ens192
                fe80::5:73ff:fea0:d4 (Cisco Systems, Inc) on ens192
                fe80::5:73ff:fea0:d5 (Cisco Systems, Inc) on ens192
           DNS: 2001:620:600:4::6
                2001:620:4::32
                2001:620:600:8::7
Search Domains: unige.ch



After a reboot, the networkctl status shows …:b00: subnet.
# networkctl status
●        State: routable
       Address: 10.194.11.42 on ens192
                2001:620:600:b00:250:56ff:feb6:26b9 on ens192 --HERE
                fd69:620:600:11:250:56ff:feb6:26b9 on ens192
                fd69:620:600:b00:250:56ff:feb6:26b9 on ens192 --HERE
                fe80::250:56ff:feb6:26b9 on ens192
       Gateway: 10.194.11.1 (Cisco Systems, Inc) on ens192
                fd69:620:600:11::1 (Cisco Systems, Inc) on ens192
                fe80::5:73ff:fea0:d4 (Cisco Systems, Inc) on ens192
                fe80::5:73ff:fea0:d5 (Cisco Systems, Inc) on ens192
           DNS: 2001:620:600:4::6
                2001:620:4::32
                2001:620:600:8::7
Search Domains: unige.ch



I have disabled other way of configuring the network
# systemctl | grep -i netwo
systemd-networkd.service   loaded active running   Network Service

systemd-resolved.service   loaded active running   Network Name
Resolution
systemd-networkd.socket    loaded active running   Network Service
Netlink Socket
network-online.target      loaded active active    Network is Online

network-pre.target         loaded active active    Network (Pre)

network.target             loaded active active    Network

# systemctl status networking
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; disabled;
vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:interfaces(5)