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 <ahmedalme...@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 > 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 < > gong...@linux.vnet.ibm.com> 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. >> >> > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > > -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dan Wendlandt Nicira, Inc: www.nicira.com twitter: danwendlandt ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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