[openstack-dev] [neutron]CIDR overlapping

Kevin Benton kevin at benton.pub
Tue Feb 14 04:17:08 UTC 2017


Do you have allow_overlapping_ips set to True?

On Mon, Feb 13, 2017 at 7:56 PM, joehuang <joehuang at huawei.com> wrote:

> Hello,
>
> During the regression test, I find that Neutron allows CIDR overlapping in
> same project.
>
> neutron --os-region-name RegionOne net-create dup-net1
> neutron --os-region-name RegionOne net-create dup-net2
> neutron --os-region-name RegionOne subnet-create dup-net1 20.0.1.0/24
> neutron --os-region-name RegionOne subnet-create dup-net2 20.0.1.0/24
>
> all commands can be executed successfully, and after then the project has
> two subnets with same CIDR: 20.0.1.0/24
>
> Should it be allowed? Or it's just because it's too difficult to address
> the race condition.
>
> Best Regards
> Chaoyi Huang (joehuang)
>
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