[Openstack] [Quantum] questions about private, external network
dan at nicira.com
Wed Dec 5 23:10:40 UTC 2012
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).
On Wed, Nov 28, 2012 at 5:09 PM, Ahmed Al-Mehdi <ahmedalmehdi at gmail.com>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
> 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,
> On Wed, Nov 28, 2012 at 4:44 PM, gong yong sheng <
> gongysh at linux.vnet.ibm.com> wrote:
>> On 11/29/2012 07:56 AM, Ahmed Al-Mehdi wrote:
>> 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
>> # 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
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