Rename CONFIG_NET_BUFSIZE to CONFIG_NET_ETH_MTU is all configuration files

78 files changed, 78 insertions, 78 deletions

diff --git a/nuttx/configs/c5471evm/httpd/defconfig b/nuttx/configs/c5471evm/httpd/defconfig
index a92ee57b9..f0147f600 100644
--- a/nuttx/configs/c5471evm/httpd/defconfig
+++ b/nuttx/configs/c5471evm/httpd/defconfig
@@ -334,7 +334,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/c5471evm/nettest/defconfig b/nuttx/configs/c5471evm/nettest/defconfig
index 24a1d59cb..525b58a60 100644
--- a/nuttx/configs/c5471evm/nettest/defconfig
+++ b/nuttx/configs/c5471evm/nettest/defconfig
@@ -332,7 +332,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/c5471evm/nsh/defconfig b/nuttx/configs/c5471evm/nsh/defconfig
index f7f0b9bad..49c81596b 100644
--- a/nuttx/configs/c5471evm/nsh/defconfig
+++ b/nuttx/configs/c5471evm/nsh/defconfig
@@ -335,7 +335,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/cloudctrl/nsh/defconfig b/nuttx/configs/cloudctrl/nsh/defconfig
index 339bc4908..72b8188dd 100644
--- a/nuttx/configs/cloudctrl/nsh/defconfig
+++ b/nuttx/configs/cloudctrl/nsh/defconfig
@@ -395,7 +395,7 @@ CONFIG_NET_MULTIBUFFER=y
 CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
diff --git a/nuttx/configs/eagle100/httpd/defconfig b/nuttx/configs/eagle100/httpd/defconfig
index 4836e728f..655600eae 100644
--- a/nuttx/configs/eagle100/httpd/defconfig
+++ b/nuttx/configs/eagle100/httpd/defconfig
@@ -401,7 +401,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/eagle100/nettest/defconfig b/nuttx/configs/eagle100/nettest/defconfig
index f3c843c1b..7d2beaf14 100644
--- a/nuttx/configs/eagle100/nettest/defconfig
+++ b/nuttx/configs/eagle100/nettest/defconfig
@@ -448,7 +448,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/eagle100/nsh/defconfig b/nuttx/configs/eagle100/nsh/defconfig
index 678b066c7..8c2677ab1 100644
--- a/nuttx/configs/eagle100/nsh/defconfig
+++ b/nuttx/configs/eagle100/nsh/defconfig
@@ -441,7 +441,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/eagle100/thttpd/defconfig b/nuttx/configs/eagle100/thttpd/defconfig
index a682e05cd..f06207ee0 100644
--- a/nuttx/configs/eagle100/thttpd/defconfig
+++ b/nuttx/configs/eagle100/thttpd/defconfig
@@ -393,7 +393,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ekk-lm3s9b96/nsh/defconfig b/nuttx/configs/ekk-lm3s9b96/nsh/defconfig
index f7edba1c2..f9d5798b5 100644
--- a/nuttx/configs/ekk-lm3s9b96/nsh/defconfig
+++ b/nuttx/configs/ekk-lm3s9b96/nsh/defconfig
@@ -427,7 +427,7 @@ CONFIG_NSOCKET_DESCRIPTORS=40
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ez80f910200zco/dhcpd/defconfig b/nuttx/configs/ez80f910200zco/dhcpd/defconfig
index ca58bc501..7c1c0ce6a 100644
--- a/nuttx/configs/ez80f910200zco/dhcpd/defconfig
+++ b/nuttx/configs/ez80f910200zco/dhcpd/defconfig
@@ -401,7 +401,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ez80f910200zco/httpd/defconfig b/nuttx/configs/ez80f910200zco/httpd/defconfig
index 8f045f45d..11c8ea12e 100644
--- a/nuttx/configs/ez80f910200zco/httpd/defconfig
+++ b/nuttx/configs/ez80f910200zco/httpd/defconfig
@@ -403,7 +403,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ez80f910200zco/nettest/defconfig b/nuttx/configs/ez80f910200zco/nettest/defconfig
index 39e16128c..d67561000 100644
--- a/nuttx/configs/ez80f910200zco/nettest/defconfig
+++ b/nuttx/configs/ez80f910200zco/nettest/defconfig
@@ -401,7 +401,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=420
+CONFIG_NET_ETH_MTU=420
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ez80f910200zco/nsh/defconfig b/nuttx/configs/ez80f910200zco/nsh/defconfig
index 0f90c3fa0..c498d0099 100644
--- a/nuttx/configs/ez80f910200zco/nsh/defconfig
+++ b/nuttx/configs/ez80f910200zco/nsh/defconfig
@@ -405,7 +405,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ez80f910200zco/poll/defconfig b/nuttx/configs/ez80f910200zco/poll/defconfig
index e1b0e6394..675c72261 100644
--- a/nuttx/configs/ez80f910200zco/poll/defconfig
+++ b/nuttx/configs/ez80f910200zco/poll/defconfig
@@ -403,7 +403,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/fire-stm32v2/nsh/defconfig b/nuttx/configs/fire-stm32v2/nsh/defconfig
index 07eed02f2..4d3ea8d99 100644
--- a/nuttx/configs/fire-stm32v2/nsh/defconfig
+++ b/nuttx/configs/fire-stm32v2/nsh/defconfig
@@ -440,7 +440,7 @@ CONFIG_NET_NOINTS=y
 CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=16
diff --git a/nuttx/configs/lm3s6432-s2e/nsh/defconfig b/nuttx/configs/lm3s6432-s2e/nsh/defconfig
index 79e18801c..56e91567b 100644
--- a/nuttx/configs/lm3s6432-s2e/nsh/defconfig
+++ b/nuttx/configs/lm3s6432-s2e/nsh/defconfig
@@ -424,7 +424,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lm3s6965-ek/discover/defconfig b/nuttx/configs/lm3s6965-ek/discover/defconfig
index 7155a1061..95bfd99d3 100644
--- a/nuttx/configs/lm3s6965-ek/discover/defconfig
+++ b/nuttx/configs/lm3s6965-ek/discover/defconfig
@@ -433,7 +433,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lm3s6965-ek/nsh/defconfig b/nuttx/configs/lm3s6965-ek/nsh/defconfig
index 7155a1061..95bfd99d3 100644
--- a/nuttx/configs/lm3s6965-ek/nsh/defconfig
+++ b/nuttx/configs/lm3s6965-ek/nsh/defconfig
@@ -433,7 +433,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lm3s6965-ek/tcpecho/defconfig b/nuttx/configs/lm3s6965-ek/tcpecho/defconfig
index b7b273ddb..a70ac1ead 100644
--- a/nuttx/configs/lm3s6965-ek/tcpecho/defconfig
+++ b/nuttx/configs/lm3s6965-ek/tcpecho/defconfig
@@ -437,7 +437,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=650
+CONFIG_NET_ETH_MTU=650
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lm3s8962-ek/nsh/defconfig b/nuttx/configs/lm3s8962-ek/nsh/defconfig
index 5f9410fe0..e6fd281b9 100644
--- a/nuttx/configs/lm3s8962-ek/nsh/defconfig
+++ b/nuttx/configs/lm3s8962-ek/nsh/defconfig
@@ -441,7 +441,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lpcxpresso-lpc1768/dhcpd/defconfig b/nuttx/configs/lpcxpresso-lpc1768/dhcpd/defconfig
index 59f749d10..7e303552f 100644
--- a/nuttx/configs/lpcxpresso-lpc1768/dhcpd/defconfig
+++ b/nuttx/configs/lpcxpresso-lpc1768/dhcpd/defconfig
@@ -472,7 +472,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lpcxpresso-lpc1768/nsh/defconfig b/nuttx/configs/lpcxpresso-lpc1768/nsh/defconfig
index fe280d51d..d41b50f19 100644
--- a/nuttx/configs/lpcxpresso-lpc1768/nsh/defconfig
+++ b/nuttx/configs/lpcxpresso-lpc1768/nsh/defconfig
@@ -518,7 +518,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/lpcxpresso-lpc1768/thttpd/defconfig b/nuttx/configs/lpcxpresso-lpc1768/thttpd/defconfig
index 618def6b6..78556276c 100644
--- a/nuttx/configs/lpcxpresso-lpc1768/thttpd/defconfig
+++ b/nuttx/configs/lpcxpresso-lpc1768/thttpd/defconfig
@@ -471,7 +471,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/ntosd-dm320/nettest/defconfig b/nuttx/configs/ntosd-dm320/nettest/defconfig
index 63b050182..cecae31a0 100644
--- a/nuttx/configs/ntosd-dm320/nettest/defconfig
+++ b/nuttx/configs/ntosd-dm320/nettest/defconfig
@@ -420,7 +420,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/ntosd-dm320/nsh/defconfig b/nuttx/configs/ntosd-dm320/nsh/defconfig
index 00011a4dc..d50e53550 100644
--- a/nuttx/configs/ntosd-dm320/nsh/defconfig
+++ b/nuttx/configs/ntosd-dm320/nsh/defconfig
@@ -435,7 +435,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/ntosd-dm320/poll/defconfig b/nuttx/configs/ntosd-dm320/poll/defconfig
index 1624555d4..bf28edc85 100644
--- a/nuttx/configs/ntosd-dm320/poll/defconfig
+++ b/nuttx/configs/ntosd-dm320/poll/defconfig
@@ -428,7 +428,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/ntosd-dm320/thttpd/defconfig b/nuttx/configs/ntosd-dm320/thttpd/defconfig
index 23e834b67..5d8785870 100644
--- a/nuttx/configs/ntosd-dm320/thttpd/defconfig
+++ b/nuttx/configs/ntosd-dm320/thttpd/defconfig
@@ -421,7 +421,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/ntosd-dm320/udp/defconfig b/nuttx/configs/ntosd-dm320/udp/defconfig
index 2953177c7..84552a673 100644
--- a/nuttx/configs/ntosd-dm320/udp/defconfig
+++ b/nuttx/configs/ntosd-dm320/udp/defconfig
@@ -420,7 +420,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/ntosd-dm320/webserver/defconfig b/nuttx/configs/ntosd-dm320/webserver/defconfig
index 2b9c8fc73..ead264b0b 100644
--- a/nuttx/configs/ntosd-dm320/webserver/defconfig
+++ b/nuttx/configs/ntosd-dm320/webserver/defconfig
@@ -423,7 +423,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/olimex-lpc1766stk/ftpc/defconfig b/nuttx/configs/olimex-lpc1766stk/ftpc/defconfig
index bdea0630d..07b29513f 100644
--- a/nuttx/configs/olimex-lpc1766stk/ftpc/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/ftpc/defconfig
@@ -502,7 +502,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=576
+CONFIG_NET_ETH_MTU=576
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-lpc1766stk/hidmouse/defconfig b/nuttx/configs/olimex-lpc1766stk/hidmouse/defconfig
index bc8295760..15c82718b 100644
--- a/nuttx/configs/olimex-lpc1766stk/hidmouse/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/hidmouse/defconfig
@@ -493,7 +493,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-lpc1766stk/nettest/defconfig b/nuttx/configs/olimex-lpc1766stk/nettest/defconfig
index 995f3a427..793123aa7 100644
--- a/nuttx/configs/olimex-lpc1766stk/nettest/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/nettest/defconfig
@@ -472,7 +472,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-lpc1766stk/nsh/defconfig b/nuttx/configs/olimex-lpc1766stk/nsh/defconfig
index d6c59b59f..9f9bd80a9 100644
--- a/nuttx/configs/olimex-lpc1766stk/nsh/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/nsh/defconfig
@@ -502,7 +502,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-lpc1766stk/slip-httpd/defconfig b/nuttx/configs/olimex-lpc1766stk/slip-httpd/defconfig
index 4c3d6063e..833263700 100644
--- a/nuttx/configs/olimex-lpc1766stk/slip-httpd/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/slip-httpd/defconfig
@@ -478,7 +478,7 @@ CONFIG_NET=y
 CONFIG_NET_NOINTS=y
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=296
+CONFIG_NET_SLIP_MTU=296
 CONFIG_NET_RECEIVE_WINDOW=256
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/olimex-lpc1766stk/thttpd/defconfig b/nuttx/configs/olimex-lpc1766stk/thttpd/defconfig
index 255024be6..70c492be3 100644
--- a/nuttx/configs/olimex-lpc1766stk/thttpd/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/thttpd/defconfig
@@ -472,7 +472,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-lpc1766stk/zmodem/defconfig b/nuttx/configs/olimex-lpc1766stk/zmodem/defconfig
index 13bafede7..40b35f0dd 100644
--- a/nuttx/configs/olimex-lpc1766stk/zmodem/defconfig
+++ b/nuttx/configs/olimex-lpc1766stk/zmodem/defconfig
@@ -516,7 +516,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-stm32-p107/nsh/defconfig b/nuttx/configs/olimex-stm32-p107/nsh/defconfig
index f748b347e..f7deb683c 100644
--- a/nuttx/configs/olimex-stm32-p107/nsh/defconfig
+++ b/nuttx/configs/olimex-stm32-p107/nsh/defconfig
@@ -702,7 +702,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=650
+CONFIG_NET_ETH_MTU=650
 CONFIG_NET_RECEIVE_WINDOW=624
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/olimex-stm32-p207/nsh/defconfig b/nuttx/configs/olimex-stm32-p207/nsh/defconfig
index 29bf644a8..28c6a9570 100644
--- a/nuttx/configs/olimex-stm32-p207/nsh/defconfig
+++ b/nuttx/configs/olimex-stm32-p207/nsh/defconfig
@@ -537,7 +537,7 @@ CONFIG_NET_MULTIBUFFER=y
 CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/olimex-strp711/nettest/defconfig b/nuttx/configs/olimex-strp711/nettest/defconfig
index ce7938818..6f510d56f 100644
--- a/nuttx/configs/olimex-strp711/nettest/defconfig
+++ b/nuttx/configs/olimex-strp711/nettest/defconfig
@@ -398,7 +398,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/pic32-starterkit/nsh2/defconfig b/nuttx/configs/pic32-starterkit/nsh2/defconfig
index ad4de2f94..a2af89208 100644
--- a/nuttx/configs/pic32-starterkit/nsh2/defconfig
+++ b/nuttx/configs/pic32-starterkit/nsh2/defconfig
@@ -540,7 +540,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/pic32mx7mmb/nsh/defconfig b/nuttx/configs/pic32mx7mmb/nsh/defconfig
index a69bb8e6c..6d52d45c1 100644
--- a/nuttx/configs/pic32mx7mmb/nsh/defconfig
+++ b/nuttx/configs/pic32mx7mmb/nsh/defconfig
@@ -593,7 +593,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/arm/default/defconfig b/nuttx/configs/rgmp/arm/default/defconfig
index 6acc36413..a18706a47 100644
--- a/nuttx/configs/rgmp/arm/default/defconfig
+++ b/nuttx/configs/rgmp/arm/default/defconfig
@@ -299,7 +299,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/arm/nsh/defconfig b/nuttx/configs/rgmp/arm/nsh/defconfig
index 9dbd5262e..e0d078854 100644
--- a/nuttx/configs/rgmp/arm/nsh/defconfig
+++ b/nuttx/configs/rgmp/arm/nsh/defconfig
@@ -321,7 +321,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/x86/cxxtest/defconfig b/nuttx/configs/rgmp/x86/cxxtest/defconfig
index b1cf34f24..2125a2ffc 100644
--- a/nuttx/configs/rgmp/x86/cxxtest/defconfig
+++ b/nuttx/configs/rgmp/x86/cxxtest/defconfig
@@ -328,7 +328,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/x86/default/defconfig b/nuttx/configs/rgmp/x86/default/defconfig
index eba6cd57e..316419071 100644
--- a/nuttx/configs/rgmp/x86/default/defconfig
+++ b/nuttx/configs/rgmp/x86/default/defconfig
@@ -307,7 +307,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/x86/helloxx/defconfig b/nuttx/configs/rgmp/x86/helloxx/defconfig
index 1b1ef07a1..dff36246a 100644
--- a/nuttx/configs/rgmp/x86/helloxx/defconfig
+++ b/nuttx/configs/rgmp/x86/helloxx/defconfig
@@ -328,7 +328,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/rgmp/x86/nsh/defconfig b/nuttx/configs/rgmp/x86/nsh/defconfig
index 646071d86..3db70e115 100644
--- a/nuttx/configs/rgmp/x86/nsh/defconfig
+++ b/nuttx/configs/rgmp/x86/nsh/defconfig
@@ -329,7 +329,7 @@ CONFIG_NSOCKET_DESCRIPTORS=5
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_ETH_MTU=1514
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/sam4e-ek/nsh/defconfig b/nuttx/configs/sam4e-ek/nsh/defconfig
index 20953f35e..cdad75690 100644
--- a/nuttx/configs/sam4e-ek/nsh/defconfig
+++ b/nuttx/configs/sam4e-ek/nsh/defconfig
@@ -615,7 +615,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/sam4e-ek/nxwm/defconfig b/nuttx/configs/sam4e-ek/nxwm/defconfig
index 346fd1133..e79a57143 100644
--- a/nuttx/configs/sam4e-ek/nxwm/defconfig
+++ b/nuttx/configs/sam4e-ek/nxwm/defconfig
@@ -673,7 +673,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/sam4e-ek/usbnsh/defconfig b/nuttx/configs/sam4e-ek/usbnsh/defconfig
index e18ebc652..77f0f4a04 100644
--- a/nuttx/configs/sam4e-ek/usbnsh/defconfig
+++ b/nuttx/configs/sam4e-ek/usbnsh/defconfig
@@ -656,7 +656,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/sama5d4-ek/nsh/defconfig b/nuttx/configs/sama5d4-ek/nsh/defconfig
index 2f2ad2ba9..ec9400468 100644
--- a/nuttx/configs/sama5d4-ek/nsh/defconfig
+++ b/nuttx/configs/sama5d4-ek/nsh/defconfig
@@ -767,7 +767,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/sama5d4-ek/nxwm/defconfig b/nuttx/configs/sama5d4-ek/nxwm/defconfig
index e2ff92ff8..18751a2f2 100644
--- a/nuttx/configs/sama5d4-ek/nxwm/defconfig
+++ b/nuttx/configs/sama5d4-ek/nxwm/defconfig
@@ -736,7 +736,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/shenzhou/nsh/defconfig b/nuttx/configs/shenzhou/nsh/defconfig
index aaf72ac25..06ff359d6 100644
--- a/nuttx/configs/shenzhou/nsh/defconfig
+++ b/nuttx/configs/shenzhou/nsh/defconfig
@@ -395,7 +395,7 @@ CONFIG_NET_MULTIBUFFER=y
 CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
diff --git a/nuttx/configs/shenzhou/nxwm/defconfig b/nuttx/configs/shenzhou/nxwm/defconfig
index 3e455c230..290172ad1 100644
--- a/nuttx/configs/shenzhou/nxwm/defconfig
+++ b/nuttx/configs/shenzhou/nxwm/defconfig
@@ -610,7 +610,7 @@ CONFIG_NET_MULTIBUFFER=y
 CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/shenzhou/thttpd/defconfig b/nuttx/configs/shenzhou/thttpd/defconfig
index 6402a1527..8c0d0e0a5 100644
--- a/nuttx/configs/shenzhou/thttpd/defconfig
+++ b/nuttx/configs/shenzhou/thttpd/defconfig
@@ -382,7 +382,7 @@ CONFIG_NET_MULTIBUFFER=y
 CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
-CONFIG_NET_BUFSIZE=768
+CONFIG_NET_ETH_MTU=768
 # CONFIG_NET_TCPURGDATA is not set
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
diff --git a/nuttx/configs/sim/nettest/defconfig b/nuttx/configs/sim/nettest/defconfig
index ecee957bc..4d09962a5 100755
--- a/nuttx/configs/sim/nettest/defconfig
+++ b/nuttx/configs/sim/nettest/defconfig
@@ -313,7 +313,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 # CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/stm3220g-eval/dhcpd/defconfig b/nuttx/configs/stm3220g-eval/dhcpd/defconfig
index a5a767f74..61e753fce 100644
--- a/nuttx/configs/stm3220g-eval/dhcpd/defconfig
+++ b/nuttx/configs/stm3220g-eval/dhcpd/defconfig
@@ -579,7 +579,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3220g-eval/nettest/defconfig b/nuttx/configs/stm3220g-eval/nettest/defconfig
index e844d6e24..88f0a6fd9 100644
--- a/nuttx/configs/stm3220g-eval/nettest/defconfig
+++ b/nuttx/configs/stm3220g-eval/nettest/defconfig
@@ -578,7 +578,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3220g-eval/nsh/defconfig b/nuttx/configs/stm3220g-eval/nsh/defconfig
index 0a70fa162..631848007 100644
--- a/nuttx/configs/stm3220g-eval/nsh/defconfig
+++ b/nuttx/configs/stm3220g-eval/nsh/defconfig
@@ -622,7 +622,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3220g-eval/nsh2/defconfig b/nuttx/configs/stm3220g-eval/nsh2/defconfig
index 0b35abded..eaea36ba0 100644
--- a/nuttx/configs/stm3220g-eval/nsh2/defconfig
+++ b/nuttx/configs/stm3220g-eval/nsh2/defconfig
@@ -625,7 +625,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3220g-eval/nxwm/defconfig b/nuttx/configs/stm3220g-eval/nxwm/defconfig
index 0b6e28cf1..b2cc0cdd4 100644
--- a/nuttx/configs/stm3220g-eval/nxwm/defconfig
+++ b/nuttx/configs/stm3220g-eval/nxwm/defconfig
@@ -657,7 +657,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3220g-eval/telnetd/defconfig b/nuttx/configs/stm3220g-eval/telnetd/defconfig
index 7a2553c84..440791322 100644
--- a/nuttx/configs/stm3220g-eval/telnetd/defconfig
+++ b/nuttx/configs/stm3220g-eval/telnetd/defconfig
@@ -578,7 +578,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/dhcpd/defconfig b/nuttx/configs/stm3240g-eval/dhcpd/defconfig
index e3f9e7a45..e574191b1 100644
--- a/nuttx/configs/stm3240g-eval/dhcpd/defconfig
+++ b/nuttx/configs/stm3240g-eval/dhcpd/defconfig
@@ -581,7 +581,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/discover/defconfig b/nuttx/configs/stm3240g-eval/discover/defconfig
index 3fa2d8c58..01b6ba8ba 100644
--- a/nuttx/configs/stm3240g-eval/discover/defconfig
+++ b/nuttx/configs/stm3240g-eval/discover/defconfig
@@ -618,7 +618,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=650
+CONFIG_NET_ETH_MTU=650
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/nettest/defconfig b/nuttx/configs/stm3240g-eval/nettest/defconfig
index cb58017c9..71ab37817 100644
--- a/nuttx/configs/stm3240g-eval/nettest/defconfig
+++ b/nuttx/configs/stm3240g-eval/nettest/defconfig
@@ -580,7 +580,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/nsh/defconfig b/nuttx/configs/stm3240g-eval/nsh/defconfig
index 2b54c09c8..e4013cd30 100644
--- a/nuttx/configs/stm3240g-eval/nsh/defconfig
+++ b/nuttx/configs/stm3240g-eval/nsh/defconfig
@@ -603,7 +603,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/nsh2/defconfig b/nuttx/configs/stm3240g-eval/nsh2/defconfig
index 2f662b73a..4c47778a1 100644
--- a/nuttx/configs/stm3240g-eval/nsh2/defconfig
+++ b/nuttx/configs/stm3240g-eval/nsh2/defconfig
@@ -627,7 +627,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/nxterm/defconfig b/nuttx/configs/stm3240g-eval/nxterm/defconfig
index a7f1a9789..d38af0559 100644
--- a/nuttx/configs/stm3240g-eval/nxterm/defconfig
+++ b/nuttx/configs/stm3240g-eval/nxterm/defconfig
@@ -714,7 +714,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/stm3240g-eval/nxwm/defconfig b/nuttx/configs/stm3240g-eval/nxwm/defconfig
index 2b2760e42..73625b417 100644
--- a/nuttx/configs/stm3240g-eval/nxwm/defconfig
+++ b/nuttx/configs/stm3240g-eval/nxwm/defconfig
@@ -752,7 +752,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/stm3240g-eval/telnetd/defconfig b/nuttx/configs/stm3240g-eval/telnetd/defconfig
index b62aa021f..8a13258bc 100644
--- a/nuttx/configs/stm3240g-eval/telnetd/defconfig
+++ b/nuttx/configs/stm3240g-eval/telnetd/defconfig
@@ -580,7 +580,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/webserver/defconfig b/nuttx/configs/stm3240g-eval/webserver/defconfig
index 47e0fcf05..417a23cdb 100644
--- a/nuttx/configs/stm3240g-eval/webserver/defconfig
+++ b/nuttx/configs/stm3240g-eval/webserver/defconfig
@@ -617,7 +617,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm3240g-eval/xmlrpc/defconfig b/nuttx/configs/stm3240g-eval/xmlrpc/defconfig
index 0ef303c6a..dcd87ed41 100644
--- a/nuttx/configs/stm3240g-eval/xmlrpc/defconfig
+++ b/nuttx/configs/stm3240g-eval/xmlrpc/defconfig
@@ -614,7 +614,7 @@ CONFIG_NSOCKET_DESCRIPTORS=10
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=650
+CONFIG_NET_ETH_MTU=650
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/stm32f4discovery/netnsh/defconfig b/nuttx/configs/stm32f4discovery/netnsh/defconfig
index a326667a8..4549421f8 100644
--- a/nuttx/configs/stm32f4discovery/netnsh/defconfig
+++ b/nuttx/configs/stm32f4discovery/netnsh/defconfig
@@ -732,7 +732,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=590
+CONFIG_NET_ETH_MTU=590
 CONFIG_NET_RECEIVE_WINDOW=536
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/viewtool-stm32f107/netnsh/defconfig b/nuttx/configs/viewtool-stm32f107/netnsh/defconfig
index 315c7367d..dc0e4d1ce 100644
--- a/nuttx/configs/viewtool-stm32f107/netnsh/defconfig
+++ b/nuttx/configs/viewtool-stm32f107/netnsh/defconfig
@@ -641,7 +641,7 @@ CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
 CONFIG_NET_MULTIBUFFER=y
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_BUFSIZE=650
+CONFIG_NET_ETH_MTU=650
 CONFIG_NET_RECEIVE_WINDOW=624
 CONFIG_NET_GUARDSIZE=2
 
diff --git a/nuttx/configs/zkit-arm-1769/hello/defconfig b/nuttx/configs/zkit-arm-1769/hello/defconfig
index 5f9815bac..3fedf8808 100644
--- a/nuttx/configs/zkit-arm-1769/hello/defconfig
+++ b/nuttx/configs/zkit-arm-1769/hello/defconfig
@@ -472,7 +472,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/zkit-arm-1769/nsh/defconfig b/nuttx/configs/zkit-arm-1769/nsh/defconfig
index 4eab2c940..5d2d3207c 100644
--- a/nuttx/configs/zkit-arm-1769/nsh/defconfig
+++ b/nuttx/configs/zkit-arm-1769/nsh/defconfig
@@ -502,7 +502,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/zkit-arm-1769/nxhello/defconfig b/nuttx/configs/zkit-arm-1769/nxhello/defconfig
index 27e881082..70b24a219 100644
--- a/nuttx/configs/zkit-arm-1769/nxhello/defconfig
+++ b/nuttx/configs/zkit-arm-1769/nxhello/defconfig
@@ -540,7 +540,7 @@ CONFIG_NSOCKET_DESCRIPTORS=8
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #
diff --git a/nuttx/configs/zkit-arm-1769/thttpd/defconfig b/nuttx/configs/zkit-arm-1769/thttpd/defconfig
index 66c6b9fe7..daf1be37a 100644
--- a/nuttx/configs/zkit-arm-1769/thttpd/defconfig
+++ b/nuttx/configs/zkit-arm-1769/thttpd/defconfig
@@ -472,7 +472,7 @@ CONFIG_NSOCKET_DESCRIPTORS=16
 CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
-CONFIG_NET_BUFSIZE=562
+CONFIG_NET_ETH_MTU=562
 # CONFIG_NET_TCPURGDATA is not set
 
 #