title: instance openstack unreachable gatewaye external network
body: <p>I have setup an ‍openstack with this structure . (kolla-ansible [&quot;wallaby&quot;])</p>
  <p><strong>My servers are on esxi.</strong></p>
  <pre><code>Controle node: 192.168.8.13
  compute node: 192.168.8.5
  neutron node: 192.168.8.6
  storage node: 192.168.8.3
  </code></pre>
  <p>kolla-ansible config (<strong>global.yml</strong>)</p>
  <pre><code>kolla_base_distro: &quot;ubuntu&quot;
  kolla_install_type: &quot;source&quot;
  openstack_release: &quot;wallaby&quot;
  kolla_internal_vip_address: &quot;192.168.8.18&quot;
  docker_registry: docker-repo.davidlab.ir:5000
  docker_registry_insecure: &quot;{{ 'yes' if docker_registry else 'no' }}&quot;
  docker_custom_config:
    registry-mirrors:
      - http://docker-repo.davidlab.ir:5000
  network_interface: &quot;ens160&quot;
  neutron_external_interface: &quot;ens192&quot;
  neutron_plugin_agent: &quot;openvswitch&quot;
  enable_chrony: &quot;yes&quot;
  enable_cinder: &quot;yes&quot;
  enable_cinder_backend_nfs: &quot;yes&quot;
  enable_neutron_provider_networks: &quot;yes&quot;
  enable_neutron_segments: &quot;yes&quot;
  enable_neutron_sfc: &quot;yes&quot;
  enable_neutron_trunk: &quot;yes&quot;
  nova_compute_virt_type: &quot;qemu&quot;
  
  </code></pre>
  <p><strong>The deploy ends successfully.</strong></p>
  <p>I login to horizon dashboard.</p>
  <p>This is my scenario:
  I have two private network:</p>
  <pre><code>   - 10.10.10.0/24 &gt; Gateway: 10.10.10.1
     - 20.10.10.0/24 &gt; Gateway: 20.10.10.1
  </code></pre>
  <p>And public network:</p>
  <pre><code>   - 192.168.8.0/24 &gt; Gateway: 192.168.8.1
  </code></pre>
  <p><strong>The topology is as follows:</strong>
  <a href="https://i.stack.imgur.com/FPvSC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FPvSC.png" alt="enter image description here" /></a></p>
  <p><strong>Networks is:</strong>
  <a href="https://i.stack.imgur.com/lpLWP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lpLWP.png" alt="enter image description here" /></a></p>
  <p><strong>Router interface:</strong>
  <a href="https://i.stack.imgur.com/N3zsN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/N3zsN.png" alt="enter image description here" /></a></p>
  <p><strong>Public network details</strong>
  <a href="https://i.stack.imgur.com/uzWwd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uzWwd.png" alt="enter image description here" /></a></p>
  <p>So, I have not to ping gateway external [<code>public network</code>]. But ping is not a problem in internal networks.
  Result ping from the instance: <a href="https://i.stack.imgur.com/9SgRZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9SgRZ.png" alt="enter image description here" /></a></p>
  <p>Result ping from the Router in <code>neutron</code> node:</p>
  <p><a href="https://i.stack.imgur.com/oavBM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oavBM.png" alt="enter image description here" /></a></p>
  <p><strong>Router route table:</strong></p>
  <p><a href="https://i.stack.imgur.com/TwdFO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TwdFO.png" alt="enter image description here" /></a></p>
  <p><strong>Netroun interfaces</strong></p>
  <p><a href="https://i.stack.imgur.com/pze0K.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pze0K.png" alt="enter image description here" /></a></p>
  <p>I have ping gateway <code>192.168.8.1</code> From all nodes.</p>
  <p><a href="https://i.stack.imgur.com/ZXTWS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZXTWS.png" alt="enter image description here" /></a></p>
  <p>Why i don't have ping gateway public network?</p>