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Message #19200
Re: [Quantum] questions about private, external network
the IP allocation pool can be a subset of the overal subnet range, if for
example, you want to limit the set of IP addresses that Quantum will hand
out to a sub-range of the total IPs in the subnet. This can be useful if a
quantum network is shared with hosts outside of openstack (e.g., with
physical hosts provisioned outside of openstack).
dan
On Wed, Nov 28, 2012 at 5:09 PM, Ahmed Al-Mehdi <ahmedalmehdi@xxxxxxxxx>wrote:
> Thank you very much for the explanation. However, I am still a bit
> confused. In the command "quantum subnet-create ..." for external network,
> I am already providing start/end allocation pool IP addr. What is the need
> for the "192.168.50.100/24" option? In this case, is this option
> redundant OR not needed (as in not used by Quantum) OR not correctly
> specified?
>
> You mentioned "192.168.50.100/30", how did you get "/30"? Is that an
> example? Or is that based on the start/end IP allocation pool?
>
> Thank you,
> Ahmed.
>
>
>
> On Wed, Nov 28, 2012 at 4:44 PM, gong yong sheng <
> gongysh@xxxxxxxxxxxxxxxxxx> wrote:
>
>> On 11/29/2012 07:56 AM, Ahmed Al-Mehdi wrote:
>>
>> Hello,
>>
>> I have a few questions related to private and external network in
>> Quantum. I am running into some odd behavior with networking related to my
>> VM instance that I am trying to resolve.
>>
>>
>> # quantum net-create --tenant-id $put_id_of_service_tenant ext_net
>> --router:external=True
>>
>> # quantum subnet-create --tenant-id $put_id_of_service_tenant
>> --allocation-pool start=192.168.50.102,end=192.168.50.126 --gateway
>> 192.168.50.1 ext_net192.168.50.100/24 --enable_dhcp=False (step b)
>>
>>
>> - 192.168.50.100/24: Is 192.168.50.100 assigned (reserved) for any
>> purpose? What is this cidr represent?
>>
>> It should be a wrong cidr.
>> I think if you are using 192.168.50.100/30, the 192.168.59.101 will be
>> reserved.
>>
>>
>
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--
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dan Wendlandt
Nicira, Inc: www.nicira.com
twitter: danwendlandt
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References