diff --git a/roles/multi-node-setup/README.rst b/roles/multi-node-setup/README.rst
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+Set up connection between infra bridge and Neutron external bridge
+
+Network topology used in CI multinode jobs is described In `Devstack documention
+<https://git.openstack.org/cgit/openstack-infra/devstack-gate/tree/multinode_setup_info.txt#n81>`_
+
+In case when DVR is used, there is also additional bridge ``br-infra`` added
+on each node to provide connectivity to floating IPs from main node.
+
+This bridge needs to be connected with bridge used by Neutron as
+external bridge. Typically it is ``br-ex`` and this role adds patch ports
+between those bridges.
+
+**Role Variables**
+
+.. zuul:rolevar:: neutron_external_bridge_name
+   :default: br-ex
+
+   Name of the Neutron external bridge.
+
+.. zuul:rolevar:: infra_bridge_name
+   :default: br-infra
+
+   Name of the infra bridge.
diff --git a/roles/multi-node-setup/defaults/main.yaml b/roles/multi-node-setup/defaults/main.yaml
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+infra_bridge_name: br-infra
+neutron_external_bridge_name: br-ex
diff --git a/roles/multi-node-setup/tasks/main.yaml b/roles/multi-node-setup/tasks/main.yaml
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+- name: Ensure the infra bridge exists
+  become: yes
+  openvswitch_bridge:
+    bridge: "{{ infra_bridge_name }}"
+
+- name: Ensure the Neutron external bridge exists
+  become: yes
+  openvswitch_bridge:
+    bridge: "{{ neutron_external_bridge_name }}"
+
+- name: Create patch port between bridges
+  become: yes
+  command: >-
+    ovs-vsctl --may-exist add-port {{ infra_bridge_name }} patch-{{ neutron_external_bridge_name }}
+    -- set interface patch-{{ neutron_external_bridge_name }} type=patch options:peer=patch-{{ infra_bridge_name }}
+    -- --may-exist add-port {{ neutron_external_bridge_name }} patch-{{ infra_bridge_name }}
+    -- set interface patch-{{ infra_bridge_name }} type=patch options:peer=patch-{{ neutron_external_bridge_name }}