# [OmniOS-discuss] Zone lo interfaces out of order

Peter Tribble peter.tribble at gmail.com
Tue Dec 6 16:04:16 UTC 2016

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    I got a bunch of errors on some of our systems yesterday, and they appear
    to be related to the following oddity. We have a bunch of zones running on
    r151014.

    Looking at the lo virtual interfaces assigned to two of the zones, this is
    what
    they look like for IPv4:

    lo0:10: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu
    8232 index 1
            zone wilma
            inet 127.0.0.1 netmask ff000000
    lo0:11: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu
    8232 index 1
            zone fred
            inet 127.0.0.1 netmask ff000000

    And this for IPv6:

    lo0:10: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu
    8252 index 1
            zone fred
            inet6 ::1/128
    lo0:11: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu
    8252 index 1
            zone wilma
            inet6 ::1/128

    Notice that lo:10 and lo:11 have been swapped over. The IPv4 version of
    lo:10
    is assigned to wilma, but the IPv6 version is assigned to fred. And vice
    versa
    with lo:11.

    This is what it looks like in one of the zones:

    lo0:11: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu
    8232 index 1
            inet 127.0.0.1 netmask ff000000
    lo0:10: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu
    8252 index 1
            inet6 ::1/128

    This doesn't look quite right to me, and it's not something I've ever seen
    before.

    This begs some questions: Is there a real problem here? Is it just us? (I've
    spotted it on more than one system, although it seems to be our new fast
    machines and not the old slow ones.) What's going to be affected?

    --
    -Peter Tribble
    http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
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