diff --git a/99_post_install.sh b/99_post_install.sh
new file mode 100644
index 0000000..a37b2c8
--- /dev/null
+++ b/99_post_install.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -xe
+
+source logging.sh
+source common.sh
+
+KUBECONFIG=${KUBECONFIG:-ocp/auth/kubeconfig}
+IFCFG_INTERFACE="assets/post-install/ifcfg-interface.template"
+IFCFG_BRIDGE="assets/post-install/ifcfg-bridge.template"
+
+export bridge="${bridge:-brext}"
+
+create_bridge(){
+  echo "Deploying Bridge ${bridge}..."
+
+  FIRST_MASTER=$(oc get node -o custom-columns=IP:.status.addresses[0].address --no-headers | head -1)
+  export interface=$(ssh -q -o StrictHostKeyChecking=no core@$FIRST_MASTER "ip r | grep default | grep -Po  '(?<=dev )(\S+)'")
+  if [ "$interface" == "" ] ; then
+    echo "Issue detecting interface to use! Leaving..."
+    exit 1
+    if [ "$interface" != "$bridge" ] ; then
+      echo "Using interface $interface"
+      export interface_content=$(envsubst < ${IFCFG_INTERFACE} | base64)
+      export bridge_content=$(envsubst < ${IFCFG_BRIDGE} | base64)
+      envsubst < assets/post-install/99-brext-master.yaml.template > assets/post-install/99-brext-master.yaml
+      echo "Done creating bridge definition"
+    else
+      echo "Bridge already there!"
+    fi
+}
+
+apply_mc(){
+  for node_type in master node; do
+    # Disable auto reboot hosts in order to apply several mcos at the same time
+    oc patch --type=merge --patch='{"spec":{"paused":true}}' machineconfigpool/${node_type}
+
+    # Apply machine configs
+    echo "Applying machine configs..."
+    oc create -f assets/post-install/*-${node_type}.yaml
+
+    # Enable auto reboot
+    oc patch --type=merge --patch='{"spec":{"paused":false}}' machineconfigpool/${node_type}
+
+    echo "Rebooting nodes..."
+    # This sleep is required because the machine-config changes are not immediate
+    sleep 30
+
+    # The 'while' is required because in the process of rebooting the masters, the
+    # oc wait connection is lost a few times, which is normal
+    while ! oc wait mcp/${node_type} --for condition=updated --timeout 600s ; do sleep 1 ; done
+  done
+}
+
+create_bridge
+apply_mc
diff --git a/assets/post-install/99-brext-master.yaml.template b/assets/post-install/99-brext-master.yaml.template
new file mode 100644
index 0000000..d0e6225
--- /dev/null
+++ b/assets/post-install/99-brext-master.yaml.template
@@ -0,0 +1,22 @@
+apiVersion: machineconfiguration.openshift.io/v1
+kind: MachineConfig
+metadata:
+  labels:
+    machineconfiguration.openshift.io/role: master
+  name: 99-brext-master
+spec:
+  config:
+    ignition:
+      version: 2.2.0
+    storage:
+      files:
+      - contents:
+          source: data:text/plain;charset=utf-8;base64,${interface_content}
+        filesystem: root
+        mode: 0644
+        path: /etc/sysconfig/network-scripts/ifcfg-${interface}
+      - contents:
+          source: data:text/plain;charset=utf-8;base64,${bridge_content}
+        filesystem: root
+        mode: 0644
+        path: /etc/sysconfig/network-scripts/ifcfg-${bridge}
diff --git a/assets/post-install/README.md b/assets/post-install/README.md
new file mode 100644
index 0000000..ae7e81b
--- /dev/null
+++ b/assets/post-install/README.md
@@ -0,0 +1,2 @@
+This directory hosts machine-config objects that will be applied in an
+alphabetically sorted list after a successful installation.
diff --git a/assets/post-install/ifcfg-bridge.template b/assets/post-install/ifcfg-bridge.template
new file mode 100644
index 0000000..ac4de35
--- /dev/null
+++ b/assets/post-install/ifcfg-bridge.template
@@ -0,0 +1,8 @@
+DEVICE=${bridge}
+NAME=${bridge}
+TYPE=Bridge
+ONBOOT=yes
+NM_CONTROLLED=yes
+BOOTPROTO=dhcp
+BRIDGING_OPTS=vlan_filtering=1
+BRIDGE_VLANS="1 pvid untagged,20,300-400 untagged"
diff --git a/assets/post-install/ifcfg-interface.template b/assets/post-install/ifcfg-interface.template
new file mode 100644
index 0000000..c010bc6
--- /dev/null
+++ b/assets/post-install/ifcfg-interface.template
@@ -0,0 +1,5 @@
+DEVICE=${interface}
+BRIDGE=${bridge}
+ONBOOT=yes
+NM_CONTROLLED=yes
+BOOTPROTO=none