diff --git a/configs/eagle100/README.txt b/configs/eagle100/README.txt
index 61cbf3d856d..729a60208a2 100644
--- a/configs/eagle100/README.txt
+++ b/configs/eagle100/README.txt
@@ -205,6 +205,12 @@ Eagle100-specific Configuration Options
 	CONFIG_LM3S_ETHLEDS - Enable to use Ethernet LEDs on the board.
 	CONFIG_LM3S_BOARDMAC - If the board-specific logic can provide
 	  a MAC address (via lm3s_ethernetmac()), then this should be selected.
+	CONFIG_LM3S_ETHHDUPLEX - Set to force half duplex operation
+	CONFIG_LM3S_ETHNOAUTOCRC - Set to suppress auto-CRC generation
+	CONFIG_LM3S_ETHNOPAD - Set to suppress Tx padding
+	CONFIG_LM3S_MULTICAST - Set to enable multicast frames
+	CONFIG_LM3S_PROMISCUOUS - Set to enable promiscuous mode
+	CONFIG_LM3S_BADCRC - Set to enable bad CRC rejection.
 
 Configurations
 ^^^^^^^^^^^^^^
diff --git a/configs/eagle100/nettest/defconfig b/configs/eagle100/nettest/defconfig
index 13071ee44d6..d2585df77b2 100644
--- a/configs/eagle100/nettest/defconfig
+++ b/configs/eagle100/nettest/defconfig
@@ -136,10 +136,22 @@ CONFIG_SPI2_DISABLE=y
 # CONFIG_LM3S_ETHLEDS - Enable to use Ethernet LEDs on the board.
 # CONFIG_LM3S_BOARDMAC - If the board-specific logic can provide
 #   a MAC address (via lm3s_ethernetmac()), then this should be selected.
-
+# CONFIG_LM3S_ETHHDUPLEX - Set to force half duplex operation
+# CONFIG_LM3S_ETHNOAUTOCRC - Set to suppress auto-CRC generation
+# CONFIG_LM3S_ETHNOPAD - Set to suppress Tx padding
+# CONFIG_LM3S_MULTICAST - Set to enable multicast frames
+# CONFIG_LM3S_PROMISCUOUS - Set to enable promiscuous mode
+# CONFIG_LM3S_BADCRC - Set to enable bad CRC rejection.
+# 
 CONFIG_LM3S_ETHERNET=y
 CONFIG_LM3S_ETHLEDS=n
 CONFIG_LM3S_BOARDMAC=y
+CONFIG_LM3S_ETHHDUPLEX=n
+CONFIG_LM3S_ETHNOAUTOCRC=n
+CONFIG_LM3S_ETHNOPAD=n
+CONFIG_LM3S_MULTICAST=n
+CONFIG_LM3S_PROMISCUOUS=n
+CONFIG_LM3S_BADCRC=n
 
 #
 # General build options
diff --git a/configs/eagle100/nsh/defconfig b/configs/eagle100/nsh/defconfig
index 66c39fb096a..871642923ba 100644
--- a/configs/eagle100/nsh/defconfig
+++ b/configs/eagle100/nsh/defconfig
@@ -131,8 +131,27 @@ CONFIG_SPI2_DISABLE=y
 #
 # LM3S6918 specific serial device driver settings
 #
+# CONFIG_LM3S_ETHERNET - This must be set (along with CONFIG_NET)
+#   to build the LM3S Ethernet driver
+# CONFIG_LM3S_ETHLEDS - Enable to use Ethernet LEDs on the board.
+# CONFIG_LM3S_BOARDMAC - If the board-specific logic can provide
+#   a MAC address (via lm3s_ethernetmac()), then this should be selected.
+# CONFIG_LM3S_ETHHDUPLEX - Set to force half duplex operation
+# CONFIG_LM3S_ETHNOAUTOCRC - Set to suppress auto-CRC generation
+# CONFIG_LM3S_ETHNOPAD - Set to suppress Tx padding
+# CONFIG_LM3S_MULTICAST - Set to enable multicast frames
+# CONFIG_LM3S_PROMISCUOUS - Set to enable promiscuous mode
+# CONFIG_LM3S_BADCRC - Set to enable bad CRC rejection.
+# 
 CONFIG_LM3S_ETHERNET=n
 CONFIG_LM3S_ETHLEDS=n
+CONFIG_LM3S_BOARDMAC=y
+CONFIG_LM3S_ETHHDUPLEX=n
+CONFIG_LM3S_ETHNOAUTOCRC=n
+CONFIG_LM3S_ETHNOPAD=n
+CONFIG_LM3S_MULTICAST=n
+CONFIG_LM3S_PROMISCUOUS=n
+CONFIG_LM3S_BADCRC=n
 
 #
 # General build options
diff --git a/configs/eagle100/ostest/defconfig b/configs/eagle100/ostest/defconfig
index f95cd1ad96c..9d445f36e8b 100644
--- a/configs/eagle100/ostest/defconfig
+++ b/configs/eagle100/ostest/defconfig
@@ -131,8 +131,27 @@ CONFIG_SPI2_DISABLE=y
 #
 # LM3S6918 specific serial device driver settings
 #
+# CONFIG_LM3S_ETHERNET - This must be set (along with CONFIG_NET)
+#   to build the LM3S Ethernet driver
+# CONFIG_LM3S_ETHLEDS - Enable to use Ethernet LEDs on the board.
+# CONFIG_LM3S_BOARDMAC - If the board-specific logic can provide
+#   a MAC address (via lm3s_ethernetmac()), then this should be selected.
+# CONFIG_LM3S_ETHHDUPLEX - Set to force half duplex operation
+# CONFIG_LM3S_ETHNOAUTOCRC - Set to suppress auto-CRC generation
+# CONFIG_LM3S_ETHNOPAD - Set to suppress Tx padding
+# CONFIG_LM3S_MULTICAST - Set to enable multicast frames
+# CONFIG_LM3S_PROMISCUOUS - Set to enable promiscuous mode
+# CONFIG_LM3S_BADCRC - Set to enable bad CRC rejection.
+# 
 CONFIG_LM3S_ETHERNET=n
 CONFIG_LM3S_ETHLEDS=n
+CONFIG_LM3S_BOARDMAC=y
+CONFIG_LM3S_ETHHDUPLEX=n
+CONFIG_LM3S_ETHNOAUTOCRC=n
+CONFIG_LM3S_ETHNOPAD=n
+CONFIG_LM3S_MULTICAST=n
+CONFIG_LM3S_PROMISCUOUS=n
+CONFIG_LM3S_BADCRC=n
 
 #
 # General build options