[openstack-dev] [neutron]CIDR overlapping

joehuang joehuang at huawei.com
Tue Feb 14 06:56:32 UTC 2017

O, it's being set to "True" in devstack installation. Thanks for clarification.

Best Regards
Chaoyi Huang (joehuang)
From: Kevin Benton [kevin at benton.pub]
Sent: 14 February 2017 12:17
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [neutron]CIDR overlapping

Do you have allow_overlapping_ips set to True?

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

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<>
neutron --os-region-name RegionOne subnet-create dup-net2<>

all commands can be executed successfully, and after then the project has two subnets with same CIDR:<>

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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