Open Stack

----- Original Message -----
> From: "Danny Choi (dannchoi)" <dannchoi at cisco.com>
> To: openstack-dev at lists.openstack.org
> 
> Hi,
> 
> When I attach 2 interfaces from the same subnet to a VM, there is no error
> returned and
> both interfaces come up.
> 
> lab at tme211:/opt/stack/logs$ nova interface-attach --net-id
> e38dba4a-74ed-4312-ba21-2a04b5c5a5b5 cirros-1
> 
> lab at tme211:/opt/stack/logs$ nova list
> 
> +--------------------------------------+----------+--------+------------+-------------+-------------------+
> 
> | ID                                   | Name     | Status | Task State |
> | Power State | Networks          |
> 
> +--------------------------------------+----------+--------+------------+-------------+-------------------+
> 
> | 9d88d0b5-2453-4657-8058-987980ec7744 | cirros-1 | ACTIVE | -          |
> | Running     | private=10.0.0.10 |
> 
> +--------------------------------------+----------+--------+------------+-------------+-------------------+
> 
> lab at tme211:/opt/stack/logs$ nova interface-attach --net-id
> e38dba4a-74ed-4312-ba21-2a04b5c5a5b5 cirros-1
> 
> lab at tme211:/opt/stack/logs$ nova list
> 
> +--------------------------------------+----------+--------+------------+-------------+------------------------------+
> 
> | ID                                   | Name     | Status | Task State |
> | Power State | Networks                     |
> 
> +--------------------------------------+----------+--------+------------+-------------+------------------------------+
> 
> | 9d88d0b5-2453-4657-8058-987980ec7744 | cirros-1 | ACTIVE | -          |
> | Running     | private=10.0.0.10, 10.0.0.11 |
> 
> +--------------------------------------+----------+--------+------------+-------------+------------------------------+
> 
> 
> $ ifconfig
> 
> eth0      Link encap:Ethernet  HWaddr FA:16:3E:92:2D:2B
> 
>           inet addr:10.0.0.10  Bcast:10.0.0.255  Mask:255.255.255.0
> 
>           inet6 addr: fe80::f816:3eff:fe92:2d2b/64 Scope:Link
> 
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> 
>           RX packets:514 errors:0 dropped:0 overruns:0 frame:0
> 
>           TX packets:307 errors:0 dropped:0 overruns:0 carrier:0
> 
>           collisions:0 txqueuelen:1000
> 
>           RX bytes:48342 (47.2 KiB)  TX bytes:41750 (40.7 KiB)
> 
> 
> eth1      Link encap:Ethernet  HWaddr FA:16:3E:EF:55:BC
> 
>           inet addr:10.0.0.11  Bcast:10.0.0.255  Mask:255.255.255.0
> 
>           inet6 addr: fe80::f816:3eff:feef:55bc/64 Scope:Link
> 
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> 
>           RX packets:49 errors:0 dropped:0 overruns:0 frame:0
> 
>           TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> 
>           collisions:0 txqueuelen:1000
> 
>           RX bytes:3556 (3.4 KiB)  TX bytes:1120 (1.0 KiB)
> 
> 
> 
> Should this operation be allowed?

Support for this was explicitly added in Juno:

    https://blueprints.launchpad.net/nova/+spec/multiple-if-1-net

Do you have a concrete reason in mind as to why this should *not* be allowed?

Thanks,

Steve