Hi Girish, please see this excellent article from Piotr at Mirantis for a discussion on the VLAN manager: http://www.mirantis.com/blog/openstack-networking-vlanmanager/ The followup article: http://www.mirantis.com/blog/vlanmanager-network-flow-analysis/ Is also extremely useful for understanding tenant isolation on the networks and the flow of data between tenants and the network controller(s). Best, -jay On 10/31/2012 04:08 PM, girish kumar wrote: > Hi All, > > I am installing openstack folsom with tenant networks being VLAN based. > In such cases, I would like to understand how the isolation will happen > between VMs of different subnets. Will the packets sent from one VM of > one subnet directly go to VMs of others subnet(because of same VLAN tag) > with out intervention of router in between. > > All these subnets corresponds to single tenant network, so the VLAN id > for these VMs will be same. > > Please clarify. Your clarifications are very much appreciated. > > -- > With Best Regards, > Girish > > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >