[Bug 1608054] Re: IPv6 static addresses in multiple interfaces can't be configured thru interfaces file

[serguei]

Hi, any new update on resolving this this? It seems to be a timing/race
condition issue.

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Title:
  IPv6 static addresses in multiple interfaces can't be configured thru
  interfaces file

Status in ifupdown package in Ubuntu:
  Confirmed

Bug description:
  Just installed 16.04 over a 14 version. I discovered that the actual
  interfaces file is not working correctly. Tried many choices, even
  using pre-up sleep 10 before configuring the IPv6 manual addresses,
  but didn't worked. This is the example file:

  auto lo
  iface lo inet loopback

  allow-hotplug eth0
  iface eth0 inet static
   mtu 9000
   address 172.16.0.7
   netmask 255.255.255.0
   dns-nameservers 10.10.10.3 80.58.61.250 80.58.61.254 8.8.8.8 8.8.4.4 2001:470:1f09:495::3 2001:470:20::2

  iface eth0 inet6 auto

  allow-hotplug eth1
  iface eth1 inet static
   mtu 9000
   address 10.10.10.7
   netmask 255.255.255.0

  iface eth1 inet6 static
   autoconf 0
   accept_ra 0
   address 2001:470:1f09:495::7
   netmask 64

  allow-hotplug eth2
  iface eth2 inet static
   mtu 9000
   address 10.10.9.7
   netmask 255.255.255.0
   gateway 10.10.9.1

  iface eth2 inet6 static
   autoconf 0
   accept_ra 0
   address 2001:470:1f1d:275::7
   netmask 64
   gateway fe80::1

  As you can see, both, eth1 and eth2 have manual/static IPv6 addresses.
  Each one is in a different router. Only eth2 is the default gateway
  (eth1 is usen only for internal communication with another LAN).
  However, after reboot, the ifconfig shows:

  eth0      Link encap:Ethernet  direcciónHW 00:0c:29:64:c6:32  
            Direc. inet:172.16.0.7  Difus.:172.16.0.255  Másc:255.255.255.0
            Dirección inet6: fe80::20c:29ff:fe64:c632/64 Alcance:Enlace
            ACTIVO DIFUSIÓN FUNCIONANDO MULTICAST  MTU:9000  Métrica:1
            Paquetes RX:17 errores:0 perdidos:0 overruns:0 frame:0
            Paquetes TX:32 errores:0 perdidos:0 overruns:0 carrier:0
            colisiones:0 long.colaTX:1000 
            Bytes RX:1500 (1.5 KB)  TX bytes:3805 (3.8 KB)

  eth1      Link encap:Ethernet  direcciónHW 00:0c:29:64:c6:3c  
            Direc. inet:10.10.10.7  Difus.:10.10.10.255  Másc:255.255.255.0
            Dirección inet6: 2001:470:1f09:495::7/64 Alcance:Global
            Dirección inet6: fe80::20c:29ff:fe64:c63c/64 Alcance:Enlace
            ACTIVO DIFUSIÓN FUNCIONANDO MULTICAST  MTU:9000  Métrica:1
            Paquetes RX:291 errores:0 perdidos:2 overruns:0 frame:0
            Paquetes TX:144 errores:0 perdidos:0 overruns:0 carrier:0
            colisiones:0 long.colaTX:1000 
            Bytes RX:34692 (34.6 KB)  TX bytes:16360 (16.3 KB)

  eth2      Link encap:Ethernet  direcciónHW 00:0c:29:64:c6:46  
            Direc. inet:10.10.9.7  Difus.:10.10.9.255  Másc:255.255.255.0
            Dirección inet6: fe80::20c:29ff:fe64:c646/64 Alcance:Enlace
            ACTIVO DIFUSIÓN FUNCIONANDO MULTICAST  MTU:9000  Métrica:1
            Paquetes RX:1281 errores:0 perdidos:0 overruns:0 frame:0
            Paquetes TX:755 errores:0 perdidos:0 overruns:0 carrier:0
            colisiones:0 long.colaTX:1000 
            Bytes RX:105008 (105.0 KB)  TX bytes:1554705 (1.5 MB)

  lo        Link encap:Bucle local  
            Direc. inet:127.0.0.1  Másc:255.0.0.0
            Dirección inet6: ::1/128 Alcance:Anfitrión
            ACTIVO BUCLE FUNCIONANDO  MTU:65536  Métrica:1
            Paquetes RX:818 errores:0 perdidos:0 overruns:0 frame:0
            Paquetes TX:818 errores:0 perdidos:0 overruns:0 carrier:0
            colisiones:0 long.colaTX:1 
            Bytes RX:136866 (136.8 KB)  TX bytes:136866 (136.8 KB)

  All what I tried fails. If I issue a manual:
  ip -6 addr add 2001:470:1f1d:275::7/64 dev eth2

  it works.

  I've noticed not sure if this is relevant, that the file
  /etc/network/run/ifstate.eth2 is empty, and /etc/network/run/ifstate
  only contains the other interfaces, but not eth2:

  eth1=eth1
  eth0=eth0
  lo=lo

  Before the upgrade it contained all the interfaces.

  I've used GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0", to keep
  the original interface names, not sure if that's relevant, just in
  case.

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