[Openstack] Network connectivity issue

FASEELA.ASHRAF faseela277 at gmail.com
Thu Aug 13 12:47:54 UTC 2015

I am installing Openstack Icehouse 3-node-architecture following the
in Ubuntu 14.04 LTS.

NIC cards for each node :

   - Network node : 3 NIC cards

         1 : management interface
         2 : Instance Tunnel Interface
         3 : External interface

   - Controller Node : 1 NIC card

         1 : Management interface

   - Compute node : 2 NIC cards

         1 : Management Interface
         2 : Instance Tunnel interface

   1. 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?
   2. After configuring the interfaces file on *Network node* for
   eth2(External interface) , external network connectivity loses on each
   reboot. The  /etc/network/interfaces file is edited as follows :

   iface *INTERFACE_NAME* inet manual
           up ip link set dev $IFACE up
           down ip link set dev $IFACE do
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