[openstack-dev] [Neutron] Is network ordering of vNICs guaranteed?
Jay Pipes
jaypipes at gmail.com
Sat Aug 9 17:16:16 UTC 2014
Paul, does this friend of a friend have a reproduceable test script for
this?
Thanks!
-jay
On 08/08/2014 04:42 PM, Kevin Benton wrote:
> If this is true, I think the issue is not on Neutron side but the Nova
> side.
> Neutron just receives and handles individual port requests. It has no
> notion of the order in which they are attached to the VM.
>
> Can you add the Nova tag to get some visibility to the Nova devs?
>
>
> On Fri, Aug 8, 2014 at 11:32 AM, CARVER, PAUL <pc2929 at att.com
> <mailto:pc2929 at att.com>> wrote:
>
> I’m hearing “friend of a friend” that people have looked at the code
> and determined that the order of networks on a VM is not guaranteed.
> Can anyone confirm whether this is true? If it is true, is there any
> reason why this is not considered a bug? I’ve never seen it happen
> myself.____
>
> __ __
>
> To elaborate, I’m being told that if you create some VMs with
> several vNICs on each and you want them to be, for example:____
>
> __ __
>
> __1)__Management Network____
>
> __2)__Production Network____
>
> __3)__Storage Network____
>
> __ __
>
> You can’t count on all the VMs having eth0 connected to the
> management network, eth1 on the production network, eth2 on the
> storage network.____
>
> __ __
>
> I’m being told that they will come up like that most of the time,
> but sometimes you will see, for example, a VM might wind up with
> eth0 connected to the production network, eth1 to the storage
> network, and eth2 connected to the storage network (or some other
> permutation.)____
>
> __ __
>
> __ __
>
>
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> --
> Kevin Benton
>
>
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