It all depends on how you have configured your br-ex on the network controller. If br-ex is on the interface that is attached to 172.x network, provide that address details as external network. But ensure you allocate the pool that is not being used by others in your coporate network. From: Geo Varghese [mailto:gvarghese at aqorn.com] Sent: Monday, November 24, 2014 12:17 PM To: openstack-operators at lists.openstack.org; openstack at lists.openstack.org Subject: [Openstack] Need help to create external network Hi Team, I need bit help to to create an external network and add it to router as gateway. Like => http://docs.openstack.org/icehouse/install-guide/install/apt/content/neutron_initial-external-network.html I am referring this command to create subnet for external network neutron subnet-create ext-net --name ext-subnet --allocation-pool start=203.0.113.101,end=203.0.113.200 --disable-dhcp --gateway 203.0.113.1 203.0.113.0/24<http://203.0.113.0/24> But my current network is bit complex 1) My machine local machine Ip => 172.17.4.64 (Its in our internal network of our company with gateway 172.17.4.254) 2) I installed kvm on my local machine and controller node with IP => 192.168.122.54 with gateway 192.168.122.1 3) Openstack instance network is in 192.168.1.101 to 192.168.1.125 with gateway 192.168.1.1 Anyone please tell me, which IP addresses I have to give while creating above subnet for my external network. -- Regards, Geo Varghese -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20141124/d300dd63/attachment.html>