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Virtual machines not getting IP's and external network is unrachable

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linux-howto

http://serverfault.com – Environment: I have installed openstack grizzly with quantum. The openstack is installed on single virtual machine using vmware. First i have created external network, router and security group using following command quantum net-create public --router:external=True Then i added my external network subnet (ip pool not used in external network) Then i created router Then i set my router gateway to external network I created security group to allow ssh and icmp. On second step i created private network with dhcp enabled Then created router interface and attach it to my private network (HowTos)