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Hi Wanjing,

As it's Juno, I assume you are using LBaaSv1. If that's the case, as
Brandon pointed, there's no subnet-id switch in the "neutron
lb-member-create" command.

Having said that you still use the subnet-id in both the following commands:
neutron lb-pool-create
neutron lb-vip-create

You should note that the subnet id in each of the above commands serve
different purpose. In the case of "lb-pool-create", the subnet-id is
provided to make sure that only members belonging to the specified
subnet-id could be added to the pool.

However, the subnet id in the "lb-vip-create" command specifies the network
range from which an ip is chosen to be assigned as a vip.

Thus, you could use different subnets for both the above commands and as
long as you have route between those two, the load balancing works.

Thanks,
Bharath.


On Tue, Apr 28, 2015 at 9:19 AM, Brandon Logan <brandon.logan at rackspace.com>
wrote:

>  ​So someone pointed out that you were using lbaas for Juno, which would
> mean you aren't using LBaaS V2.  So you're using V1.  V1 member's do not
> take subnet_id as an attribute.  Let me know how you are making your
> requests.
>
>
>  Thanks,
>
> Brandon
>  ------------------------------
> *From:* Brandon Logan <brandon.logan at RACKSPACE.COM>
> *Sent:* Monday, April 27, 2015 8:40 PM
> *To:* OpenStack Development Mailing List not for usage questions
> *Subject:* Re: [openstack-dev] [Neutron][LBaaS] Why do we need to select
> subnet when creating a pool?
>
>
> I'm assuming you are using LBaaS V2.  With that assumption, I'm not sure
> how you are having to select subnet on the pool.  It's not supposed to be a
> field at all on the pool object.  subnet_id is required on the member
> object right now, but that's something I and others think should just be
> optional, and if not specified then it's assumed that member can be reached
> with whatever has already been setup.​  Another option is pool could get a
> subnet_id field in the future and all members that are created without
> subnet_id are assumed to be on the pool's subnet_id, but I'm getting ahead
> of myself and this has no bearing on your current issue.
>
>
>  Could you tell me how you are making your requests? CLI? REST directly?
>  ------------------------------
> *From:* Wanjing Xu <wanjing_xu at hotmail.com>
> *Sent:* Monday, April 27, 2015 12:57 PM
> *To:* OpenStack Development Mailing List not for usage questions
> *Subject:* [openstack-dev] [Neutron][LBaaS] Why do we need to select
> subnet when creating a pool?
>
>  So when I use Haproxy for LBaaS for Juno, there is a subnet mandatary
> field that I need to fill in when creating a pool, and later on when I add
> members, I can use a different subnet(or simply just enter the ip of the
> member), when adding vip, I can still select a third subnet.  So what is
> the usage of the first subnet that I used to create pool?  There is no port
> created for this pool subnet.  I can see that a port is created for the vip
> subnet that the loadbalancer instance is binding to.
>
>  Regards!
>
>  Wanjing Xu
>
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