Hi,

I'm trying to configure an Ubuntu 12.04 Server VM with static IP addresses.
The config is this:

[...]

# IPv6 static address
iface eth0 inet6 static
         address 2001:610:148:cafe::9
         netmask 64
         autoconf 0
         privext 0

These flags only work in Debian Wheezy (7.0) and, if I read the changelogs correctly, in or after Ubuntu 12.10 (quantal). For Ubuntu 12.04 you need to use sysctl.

   The static Method
This method may be used to define interfaces with statically assigned IPv6 addresses. By default, stateless autoconfiguration is disabled for this interface.

       Options

              address address
                     Address (colon delimited/netmask) required

              netmask mask
                     Netmask (number of bits, eg 64)

              gateway address
                     Default gateway (colon delimited)

              media type
                     Medium type, driver dependent

              hwaddress address
                     Hardware address

              mtu size
                     MTU size

              accept_ra int
                     Accept router advertisements (0=off, 1=on)

              autoconf int
Perform stateless autoconfiguration (0=off, 1=on). Default value: "0"

              privext int
Privacy extensions (RFC3041) (0=off, 1=assign, 2=prefer)

scope Address validity scope. Possible values: global, site, link, host

              preferred-lifetime int
                     Time that address remains preferred

Bernhard

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