diff --git a/group_vars/all/main.yml b/group_vars/all/main.yml
index 9270a1b..6e9e432 100644
--- a/group_vars/all/main.yml
+++ b/group_vars/all/main.yml
@@ -1,9 +1,12 @@
 ---
 
 
+#ansible_managed: !!str " *** [ Ansible managed file: DO NOT EDIT DIRECTLY ] ***"
+
 ansible_managed: >
   *** ANSIBLE MANAGED FILE - DO NOT EDIT ***
-  This file was generated by {{ ansible_user_id }} on {{ ansible_date_time.iso8601 }}
+
+#  This file was generated by {{ ansible_user_id }} on {{ ansible_date_time.iso8601 }}
 
 
 # ---
diff --git a/host_vars/o43.oopen.de.yml b/host_vars/o43.oopen.de.yml
index f8a9b34..b7be8e0 100644
--- a/host_vars/o43.oopen.de.yml
+++ b/host_vars/o43.oopen.de.yml
@@ -32,7 +32,7 @@ network_interfaces:
 
     family: inet
     method: static
-    hwaddress: 9c:6b:00:51:bf:54
+    hwaddress: 9c:6b:00:2b:fe:4f
     description:
     address: 176.9.62.77
     netmask: 27
@@ -119,6 +119,98 @@ network_interfaces:
     gateway: 'fe80::1'
 
 
+  - device: br1
+    # use only once per device (for the first device entry)
+    headline: br1 - bridge over device enp6s0.4001
+
+    # auto & allow are only used for the first device entry
+    allow: [] # array of allow-[stanzas] eg. allow-hotplug
+    auto: true
+
+    family: inet
+    method: static
+    hwaddress: 9c:6b:00:2b:fe:50
+    description:
+    address: 172.20.1.10
+    netmask: 24
+    gateway:
+    metric:
+    pointopoint:
+    mtu:
+    scope:
+
+    # additional user by dhcp method
+    #
+    hostname:
+    leasehours:
+    leasetime:
+    vendor:
+    client:
+
+    # additional used by bootp method
+    #
+    bootfile:
+    server:
+    hwaddr:
+
+    # optional dns settings nameservers: []
+    #
+    #    nameservers:
+    #      - 194.150.168.168  # dns.as250.net
+    #      - 91.239.100.100   # anycast.censurfridns.dk
+    #    search: warenform.de
+    #
+    # ** MOVED TO systemd-resolved
+    #
+    nameservers:
+    search:
+
+    # optional bridge parameters bridge: {}
+    # bridge:
+    #   ports:
+    #   stp:
+    #   fd:
+    #   maxwait:
+    #   waitport:
+    bridge:
+      ports: enp6s0.4001 # for mor devices support a blank separated list
+      stp: !!str off
+      fd: 5
+      hello: 2
+      maxage: 12
+
+    #  optional bonding parameters bond: {}
+    #  bond:
+    #    master
+    #    primary
+    #    slave
+    #    method:
+    #    miimon:
+    #    lacp-rate:
+    #    ad-select-rate:
+    #    master:
+    #    slaves:
+    bond: {}
+
+    # optional vlan settings | vlan: {}
+    # vlan: {}
+    #   raw-device: 'eth0'
+    vlan: {}
+
+    # inline hook scripts
+    #pre-up: [] # pre-up script lines
+    pre-up:
+      - /sbin/ip link add link enp6s0 name enp6s0.4001 type vlan id 4001
+      - /sbin/ip link set enp6s0.4001 mtu 1400
+    up: [] # up script lines
+    #post-up: [] # post-up script lines (alias for up)
+    post-up: # post-up script lines (alias for up)
+      - /sbin/ip route add 172.20.0.0/21 via 172.20.1.1
+    pre-down: [] # pre-down script lines (alias for down)
+    down: [] # down script lines
+    post-down: [] # post-down script lines
+
+
 # ---
 # vars used by roles/ansible_dependencies
 # ---