diff --git a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/br0.network b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/br0.network
new file mode 100644
index 0000000..756e9f1
--- /dev/null
+++ b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/br0.network
@@ -0,0 +1,5 @@
+[Match]
+Name=br0
+
+[Network]
+DHCP=yes
diff --git a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth0.network b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth0.network
index 16ac288..50bb37c 100644
--- a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth0.network
+++ b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth0.network
@@ -1,4 +1,7 @@
 [Match]
 Name=eth0
+
 [Network]
-DHCP=yes
+Bridge=br0
+LLDP=true
+EmitLLDP=nearest-bridge
diff --git a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth1.network b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth1.network
index c13511b..c83f5aa 100644
--- a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth1.network
+++ b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth1.network
@@ -1,4 +1,7 @@
 [Match]
 Name=eth1
+
 [Network]
-DHCP=yes
+Bridge=br0
+LLDP=true
+EmitLLDP=nearest-bridge
diff --git a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth2.network b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth2.network
index 4196824..9b10d22 100644
--- a/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth2.network
+++ b/board/czechlight/clearfog/overlay/usr/lib/systemd/network/eth2.network
@@ -1,4 +1,7 @@
 [Match]
 Name=eth2
+
 [Network]
-DHCP=yes
+Bridge=br0
+LLDP=true
+EmitLLDP=nearest-bridge
diff --git a/board/czechlight/clearfog/overlay/usr/lib/systemd/system-generators/czechlight-br0-clone-mac b/board/czechlight/clearfog/overlay/usr/lib/systemd/system-generators/czechlight-br0-clone-mac
new file mode 100755
index 0000000..a87a67c
--- /dev/null
+++ b/board/czechlight/clearfog/overlay/usr/lib/systemd/system-generators/czechlight-br0-clone-mac
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -e
+
+# got to override the lock dir as /var is not available yet
+ETH0_MAC=$(/sbin/fw_printenv -n eth1addr -l $1)
+
+mkdir -p /run/systemd/network
+
+cat > /run/systemd/network/00-br0-cloned-mac.netdev <<EOF
+[NetDev]
+Name=br0
+Kind=bridge
+MACAddress=${ETH0_MAC}
+HelloTimeSec=1
+ForwardDelaySec=4
+[Bridge]
+STP=1
+EOF
+
+/bin/rm -f /run/systemd/generator/fw_printenv.lock