First of all let me thank you very much for your clear replies! Yes! That makes sense indeed for the Virtual Machines! What about the compute node itself? If I am not wrong at that point of documentation nova-network hasn't been installed or configured. So how is it possible the connectivity tests with the external network to be successful as shown at that point? Furthermore if someone wants to have direct SSH access to the node from the external network how is that achieved? In general how does the physical node itself access the external network? All the best, George On Wed, 19 Nov 2014 14:25:29 +0000, Aaron Segura wrote: > Think of your external interface as if it were a switch. The guests > are plugged in to the switch. They will have IP addresses that allow > them to communicate on the network. The physical interface just ships > packets back and forth between physical and virtual networks, and > doesnt need its own address. Make more sense? > > On Wed, Nov 19, 2014, 07:53 Georgios Dimitrakakis wrote: > >> Hello stackers! >> >> In OpenStack documentation and specifically on Legacy Networking >> >> > > http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova >> [1] >> >> says clearly that for a two node installation the interface >> dedicated >> to the external network should not be configured with an IP >> address. >> >> Is this correct?? >> >> Furthermore at the "Verify Connectivity" part is pinging >> successfully >> on the external network and my question is how is this happening? >> Does >> it assume that there is a third interface already connected on >> the >> external network?? >> >> How is accessing the external network without even configuring >> the >> interface dedicated at it?? Does it assume that the internal >> network >> somehow performs a routing?? >> >> Best regards, >> >> G. >> >> _______________________________________________ >> Mailing list: >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [2] >> Post to : openstack at lists.openstack.org [3] >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [4] > > > Links: > ------ > [1] > > http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova > [2] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > [3] mailto:openstack at lists.openstack.org > [4] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > [5] mailto:giorgis at acmac.uoc.gr