diff --git a/arch/arm/boards/a9m2410/env/config b/arch/arm/boards/a9m2410/env/config
index 79150ce..2b09318 100644
--- a/arch/arm/boards/a9m2410/env/config
+++ b/arch/arm/boards/a9m2410/env/config
@@ -23,4 +23,4 @@
 eth0.netmask=255.255.0.0
 eth0.gateway=192.168.23.1
 eth0.serverip=192.168.23.2
-eth0.ethaddr=00:04:f3:00:06:35
+#eth0.ethaddr=
diff --git a/arch/arm/boards/a9m2440/env/config b/arch/arm/boards/a9m2440/env/config
index 936c35f..d1fb01b 100644
--- a/arch/arm/boards/a9m2440/env/config
+++ b/arch/arm/boards/a9m2440/env/config
@@ -23,4 +23,4 @@
 eth0.netmask=255.255.0.0
 eth0.gateway=192.168.23.1
 eth0.serverip=192.168.23.2
-eth0.ethaddr=00:04:f3:00:06:35
+#eth0.ethaddr=
diff --git a/arch/arm/boards/edb93xx/env/config b/arch/arm/boards/edb93xx/env/config
index 47ab209..3266272 100644
--- a/arch/arm/boards/edb93xx/env/config
+++ b/arch/arm/boards/edb93xx/env/config
@@ -3,7 +3,7 @@
 eth0.ipaddr=192.168.0.50
 eth0.netmask=255.255.0.0
 eth0.serverip=192.168.0.8
-eth0.ethaddr=80:81:82:83:84:85
+#eth0.ethaddr=
 
 board=edb9301
 autoboot_timeout=3
diff --git a/arch/arm/boards/freescale-mx25-3ds/env/config b/arch/arm/boards/freescale-mx25-3ds/env/config
index a5e492e..8469935 100644
--- a/arch/arm/boards/freescale-mx25-3ds/env/config
+++ b/arch/arm/boards/freescale-mx25-3ds/env/config
@@ -26,4 +26,4 @@
 eth0.netmask=255.255.255.0
 #eth0.gateway=a.b.c.d
 eth0.serverip=192.168.3.10
-eth0.ethaddr=00:50:c2:8c:e6:0e
+#eth0.ethaddr=
diff --git a/arch/arm/boards/friendlyarm-mini6410/env/config b/arch/arm/boards/friendlyarm-mini6410/env/config
index a1c86e1..74beeff 100644
--- a/arch/arm/boards/friendlyarm-mini6410/env/config
+++ b/arch/arm/boards/friendlyarm-mini6410/env/config
@@ -12,7 +12,7 @@
 #eth0.ipaddr=a.b.c.d.e
 #eth0.netmask=a.b.c.d.e
 #eth0.gateway=a.b.c.d.e
-eth0.ethaddr=08:90:90:90:90:90
+#eth0.ethaddr=
 
 # can be either 'nfs', 'tftp' or 'nand'
 kernel_loc=tftp
diff --git a/arch/arm/boards/friendlyarm-tiny6410/env/config b/arch/arm/boards/friendlyarm-tiny6410/env/config
index 35d0fac..6422e9f 100644
--- a/arch/arm/boards/friendlyarm-tiny6410/env/config
+++ b/arch/arm/boards/friendlyarm-tiny6410/env/config
@@ -12,7 +12,7 @@
 #eth0.ipaddr=a.b.c.d.e
 #eth0.netmask=a.b.c.d.e
 #eth0.gateway=a.b.c.d.e
-eth0.ethaddr=08:90:90:90:90:90
+#eth0.ethaddr=
 
 # can be either 'nfs', 'tftp' or 'nand'
 kernel_loc=tftp