<div dir="ltr"><span style="font-size:12.8000001907349px">I am installing Openstack Icehouse 3-node-architecture following the document <a href="http://docs.openstack.org/icehouse/install-guide/install/apt/content/index.html">http://docs.openstack.org/icehouse/install-guide/install/apt/content/index.html</a> in Ubuntu 14.04 LTS.</span><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px">NIC cards for each node :</span></div><div><ul><li><span style="font-size:12.8000001907349px">Network node : 3 NIC cards </span></li></ul><span style="font-size:12.8000001907349px"> 1 : management interface</span></div><div><span style="font-size:12.8000001907349px"> 2 : Instance Tunnel Interface</span></div><div><span style="font-size:12.8000001907349px"> 3 : External interface</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><ul><li><span style="font-size:12.8000001907349px">Controller Node : 1 NIC card</span></li></ul><span style="font-size:12.8000001907349px"> 1 : Management interface</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><ul><li><span style="font-size:12.8000001907349px">Compute node : 2 NIC cards</span></li></ul><span style="font-size:12.8000001907349px"> 1 : Management Interface</span></div><div><span style="font-size:12.8000001907349px"> 2 : Instance Tunnel interface</span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><ol><li><span style="font-size:12.8000001907349px">To verify connectivity other than pinging to these NICs they say to ping to a site on the internet. There is no network connectivity in any nodes. So how is it possible?</span><br></li><li><span style="font-size:12.8000001907349px">After configuring the interfaces file on <b>Network node</b> for eth2(External interface) , external network connectivity loses on each reboot. The </span><span style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:13.3333330154419px"> </span><code class="filename" style="color:rgb(0,0,0);font-size:13.3333330154419px">/etc/network/interfaces</code><span style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:13.3333330154419px"> file is edited as follows :</span></li><li><pre class="programlisting" style="color:rgb(35,48,45);font-family:Monaco,'Courier New','DejaVu Sans Mono','Bitstream Vera Sans Mono',monospace;font-stretch:normal;overflow-x:scroll;width:1003px;border-bottom-color:rgb(222,222,222)!important;border-bottom-style:solid!important;border-bottom-width:1px!important;border-top-color:rgb(222,222,222)!important;border-top-style:solid!important;border-top-width:1px!important;font-size:12px!important;padding:0.5em!important">auto <em class="replaceable"><code>INTERFACE_NAME</code></em>
iface <em class="replaceable"><code>INTERFACE_NAME</code></em> inet manual
up ip link set dev $IFACE up
down ip link set dev $IFACE do</pre></li></ol></div><div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px"><br></span><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px"><br></span></div><div><span style="font-size:12.8000001907349px"><br></span></div></div></div></div>