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Hi

Thank you for your comment.
I see. dual stack network need ipv4 and bunch of ipv6 prefix
(link-local, global, temporary global..) on one network.

>> The reason for this is because you can have multiple subnets on the same
>> L2 bcast domain. You can use ip aliasing in order to use multiple subnets on
>> one virtual nic. For example ifconfig eth0:1 a.b.c.d/24; ifconfig eth0:2
>> d.e.f.g/24
This means, It seems like vlan tagging?

Thanks!
Suzuki

On Tue, Aug 14, 2012 at 12:50 PM, Dan Wendlandt <dan at nicira.com> wrote:
> In a dual stack deployment there may be a v4 and a v6 subnet on the same
> network.
>
> There's also the case that a service provider has a notion of a public
> network, which is represented by a UUID.  After a period of time, they may
> run out of IPs in one subnet, and want to assign another subnet as well,
> without forcing tenants to have to start using a new identifier for the
> public network.   Of course, the provider would be responsible for creating
> L3 connectivity between the two subnets.
>
> Others can chime in, but those where the two cases that I remember.
>
> Dan
>
>
> On Mon, Aug 13, 2012 at 8:31 PM, Aaron Rosen <arosen at nicira.com> wrote:
>>
>> The reason for this is because you can have multiple subnets on the same
>> L2 bcast domain. You can use ip aliasing in order to use multiple subnets on
>> one virtual nic. For example ifconfig eth0:1 a.b.c.d/24; ifconfig eth0:2
>> d.e.f.g/24
>>
>> Aaron
>>
>>
>> On Mon, Aug 13, 2012 at 7:52 PM, Takaaki Suzuki <suzuki at midokura.com>
>> wrote:
>>>
>>> Hi all.
>>>
>>> I have one question. I prepared devstack with Qauntum V2.
>>> Now I can create Subnet for Network.
>>> And I can add multiple Subnet for one Network. VM can use multiple
>>> subnet for one virtual NIC?
>>> Why quantum v2 can create multiple subnet for one Network?
>>>
>>> quantum --os_token 1b73ace152c440ea939c2329fd115e56 --os_url
>>> http://localhost:9696/ net-list
>>>
>>> +----------------+--------------------------------------+-----------+--------+--------------------------------------+----------------------------------+
>>> | admin_state_up | id                                   | name      |
>>> status | subnets                              | tenant_id
>>>           |
>>>
>>> +----------------+--------------------------------------+-----------+--------+--------------------------------------+----------------------------------+
>>> | True           | d7a8106c-7ca6-4302-a065-6a87c859ed9c | test
>>> | ACTIVE | 474ea30c-9337-4f48-854c-9f572538a44c |
>>> 4fb66e3355304be5a6f3340d7067b369 |
>>> |                  |
>>>            |                |              |
>>> 52ffda8c-61aa-465b-ae62-1ef57e9bed85 |
>>>                         |
>>> |                  |
>>>            |                |              |
>>> 9a659285-c6b1-4e6f-b3f0-c3e37341e0be |
>>>                        |
>>>
>>> quantum --os_token 1b73ace152c440ea939c2329fd115e56 --os_url
>>> http://localhost:9696/ subnet-list
>>>
>>> +------------------------------------------------------+------------------+---------------+--------------------------------------+------------+--------+--------------------------------------+----------------------------------+
>>> | allocation_pools                                     | cidr
>>>    | gateway_ip    | id                                   | ip_version
>>> | name   | network_id                           | tenant_id
>>>             |
>>>
>>> +------------------------------------------------------+------------------+---------------+--------------------------------------+------------+--------+--------------------------------------+----------------------------------+
>>> | {"start": "192.168.100.2", "end": "192.168.100.254"} |
>>> 192.168.100.0/24 | 192.168.100.1 |
>>> 474ea30c-9337-4f48-854c-9f572538a44c |          4 | test01 |
>>> d7a8106c-7ca6-4302-a065-6a87c859ed9c |
>>> 4fb66e3355304be5a6f3340d7067b369 |
>>> | {"start": "192.168.210.2", "end": "192.168.210.254"} |
>>> 192.168.210.0/24 | 192.168.210.1 |
>>> 52ffda8c-61aa-465b-ae62-1ef57e9bed85 |          4 | test03 |
>>> d7a8106c-7ca6-4302-a065-6a87c859ed9c |
>>> 4fb66e3355304be5a6f3340d7067b369 |
>>> | {"start": "192.168.200.2", "end": "192.168.200.254"} |
>>> 192.168.200.0/24 | 192.168.200.1 |
>>> 9a659285-c6b1-4e6f-b3f0-c3e37341e0be |          4 | test02 |
>>> d7a8106c-7ca6-4302-a065-6a87c859ed9c |
>>> 4fb66e3355304be5a6f3340d7067b369 |
>>>
>>> +------------------------------------------------------+------------------+---------------+--------------------------------------+------------+--------+--------------------------------------+----------------------------------+
>>>
>>> Thanks!
>>> Suzuki
>>>
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>>
>>
>>
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>
>
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Dan Wendlandt
> Nicira, Inc: www.nicira.com
> twitter: danwendlandt
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>