Comment 6 for bug 95968

Current Feisty's version brings up the interfaces on boot with your /e/n/i, and network-manager ignores them (goes into 'manual configuration' state). However, n-m does shut down the subinterfaces when I remove the main 'eth0' stanza. However, this is not a supported configuration, it seems, since ifupdown itself is not able to bring it up (it fails with 'SIOCSIFFLAGS: Cannot assign requested address'). Thus this network-manager upload has fixed this case:

network-manager (0.6.4-6ubuntu4) feisty; urgency=low

  * /etc/network/interfaces can have more than one instance of the same
    interface. For example:

    iface eth0 inet dhcp
    and later
    iface eth0 inet6 static

    The function ifparser_getif is capable only to return the first instance
    of eth0 that is a legal entry for NM to take over, but NM still does not
    know how to handle what's next.

    Patch 19_interfaces_can_have_more_than_one_instance.patch creates a sub
    list of linked if_block via nextsame, binding together all if_block's
    related to the same interface and preserving if_data for each block.

    Patch 20_do_not_take_over_dhcpv4iface_when_v6_is_configured.patch
    blacklist interfaces that have dhcp for inet configuration but have an
    inet6 entry following later on. NM does not know yet how to
    store/restore/configure IPv6 (blacklisted too) so for now we tell NM
    to keep the hands off these interfaces.

    (Closes LP: #93636)

 -- Fabio M. Di Nitto <email address hidden> Fri, 30 Mar 2007 11:17:42 +0200