unable to communicate to external IP if external network is configured on ethx interface

Solution In Progress - Updated -

Issue

  • The controller node has 3 NICs:

    • 1 (nic1) for the provisioning network ONLY (192.0.2.x - dhcp enabled to get the IP from undercloud)
    • 1 (nic2) for the external network (static IP, allocated by the undercloud, native VLAN, no dhcp)
    • 1 (nic3) for the internal openstack networks (divided into VLANs, as per the documentation, no dhcp)
  • Every other node has 2 NICs:

    • 1 (nic1) for the provisioning network ONLY (192.0.2.x - dhcp enabled to get the IP from undercloud)
    • 1 (nic2) for the internal openstack networks (divided into VLANs, as per the documentation, no dhcp)
  • Problem: Creating a brand new overcloud results in the default route being set to the 192.0.2.x network on the controller node, as opposed to the external network.

Environment

  • Red Hat Open Stack 7

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