diff --git a/boards.txt b/boards.txt
index 1e8aada7ee..d1fe3bed49 100644
--- a/boards.txt
+++ b/boards.txt
@@ -175,16 +175,18 @@ generic.menu.FlashSize.16M15M.upload.maximum_size=1044464
 generic.menu.FlashSize.16M15M.build.spiffs_start=0x100000
 generic.menu.FlashSize.16M15M.build.spiffs_end=0xFFB000
 generic.menu.FlashSize.16M15M.build.spiffs_blocksize=8192
-generic.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-generic.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-generic.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-generic.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+generic.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+generic.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+generic.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+generic.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+generic.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+generic.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+generic.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+generic.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+generic.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 generic.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 generic.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-generic.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-generic.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-generic.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-generic.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+generic.menu.LwIPVariant.OpenSource=v1.4 Open Source
 generic.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 generic.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 generic.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -349,16 +351,18 @@ esp8285.menu.FlashSize.1M512.upload.maximum_size=499696
 esp8285.menu.FlashSize.1M512.build.spiffs_start=0x7B000
 esp8285.menu.FlashSize.1M512.build.spiffs_end=0xFB000
 esp8285.menu.FlashSize.1M512.build.spiffs_blocksize=8192
-esp8285.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-esp8285.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-esp8285.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-esp8285.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+esp8285.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+esp8285.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+esp8285.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+esp8285.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+esp8285.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+esp8285.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+esp8285.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+esp8285.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+esp8285.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 esp8285.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 esp8285.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-esp8285.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-esp8285.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-esp8285.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-esp8285.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+esp8285.menu.LwIPVariant.OpenSource=v1.4 Open Source
 esp8285.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 esp8285.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 esp8285.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -480,16 +484,18 @@ espduino.menu.FlashSize.4M3M.upload.maximum_size=1044464
 espduino.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 espduino.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 espduino.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-espduino.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-espduino.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-espduino.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-espduino.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+espduino.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+espduino.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+espduino.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+espduino.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+espduino.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+espduino.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+espduino.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+espduino.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+espduino.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 espduino.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 espduino.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-espduino.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-espduino.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-espduino.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-espduino.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+espduino.menu.LwIPVariant.OpenSource=v1.4 Open Source
 espduino.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 espduino.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 espduino.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -603,16 +609,18 @@ huzzah.menu.FlashSize.4M3M.upload.maximum_size=1044464
 huzzah.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 huzzah.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 huzzah.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-huzzah.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-huzzah.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-huzzah.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-huzzah.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+huzzah.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+huzzah.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+huzzah.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+huzzah.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+huzzah.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+huzzah.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+huzzah.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+huzzah.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+huzzah.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 huzzah.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 huzzah.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-huzzah.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-huzzah.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-huzzah.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-huzzah.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+huzzah.menu.LwIPVariant.OpenSource=v1.4 Open Source
 huzzah.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 huzzah.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 huzzah.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -729,16 +737,18 @@ espresso_lite_v1.menu.ResetMethod.ck=ck
 espresso_lite_v1.menu.ResetMethod.ck.upload.resetmethod=ck
 espresso_lite_v1.menu.ResetMethod.nodemcu=nodemcu
 espresso_lite_v1.menu.ResetMethod.nodemcu.upload.resetmethod=nodemcu
-espresso_lite_v1.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-espresso_lite_v1.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-espresso_lite_v1.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-espresso_lite_v1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+espresso_lite_v1.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+espresso_lite_v1.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+espresso_lite_v1.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+espresso_lite_v1.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+espresso_lite_v1.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+espresso_lite_v1.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+espresso_lite_v1.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+espresso_lite_v1.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+espresso_lite_v1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 espresso_lite_v1.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 espresso_lite_v1.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-espresso_lite_v1.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-espresso_lite_v1.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-espresso_lite_v1.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-espresso_lite_v1.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+espresso_lite_v1.menu.LwIPVariant.OpenSource=v1.4 Open Source
 espresso_lite_v1.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 espresso_lite_v1.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 espresso_lite_v1.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -855,16 +865,18 @@ espresso_lite_v2.menu.ResetMethod.ck=ck
 espresso_lite_v2.menu.ResetMethod.ck.upload.resetmethod=ck
 espresso_lite_v2.menu.ResetMethod.nodemcu=nodemcu
 espresso_lite_v2.menu.ResetMethod.nodemcu.upload.resetmethod=nodemcu
-espresso_lite_v2.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-espresso_lite_v2.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-espresso_lite_v2.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-espresso_lite_v2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+espresso_lite_v2.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+espresso_lite_v2.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+espresso_lite_v2.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+espresso_lite_v2.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+espresso_lite_v2.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+espresso_lite_v2.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+espresso_lite_v2.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+espresso_lite_v2.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+espresso_lite_v2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 espresso_lite_v2.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 espresso_lite_v2.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-espresso_lite_v2.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-espresso_lite_v2.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-espresso_lite_v2.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-espresso_lite_v2.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+espresso_lite_v2.menu.LwIPVariant.OpenSource=v1.4 Open Source
 espresso_lite_v2.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 espresso_lite_v2.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 espresso_lite_v2.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -981,16 +993,18 @@ phoenix_v1.menu.ResetMethod.ck=ck
 phoenix_v1.menu.ResetMethod.ck.upload.resetmethod=ck
 phoenix_v1.menu.ResetMethod.nodemcu=nodemcu
 phoenix_v1.menu.ResetMethod.nodemcu.upload.resetmethod=nodemcu
-phoenix_v1.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-phoenix_v1.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-phoenix_v1.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-phoenix_v1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+phoenix_v1.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+phoenix_v1.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+phoenix_v1.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+phoenix_v1.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+phoenix_v1.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+phoenix_v1.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+phoenix_v1.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+phoenix_v1.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+phoenix_v1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 phoenix_v1.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 phoenix_v1.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-phoenix_v1.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-phoenix_v1.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-phoenix_v1.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-phoenix_v1.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+phoenix_v1.menu.LwIPVariant.OpenSource=v1.4 Open Source
 phoenix_v1.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 phoenix_v1.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 phoenix_v1.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1107,16 +1121,18 @@ phoenix_v2.menu.ResetMethod.ck=ck
 phoenix_v2.menu.ResetMethod.ck.upload.resetmethod=ck
 phoenix_v2.menu.ResetMethod.nodemcu=nodemcu
 phoenix_v2.menu.ResetMethod.nodemcu.upload.resetmethod=nodemcu
-phoenix_v2.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-phoenix_v2.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-phoenix_v2.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-phoenix_v2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+phoenix_v2.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+phoenix_v2.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+phoenix_v2.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+phoenix_v2.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+phoenix_v2.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+phoenix_v2.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+phoenix_v2.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+phoenix_v2.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+phoenix_v2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 phoenix_v2.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 phoenix_v2.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-phoenix_v2.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-phoenix_v2.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-phoenix_v2.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-phoenix_v2.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+phoenix_v2.menu.LwIPVariant.OpenSource=v1.4 Open Source
 phoenix_v2.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 phoenix_v2.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 phoenix_v2.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1230,16 +1246,18 @@ nodemcu.menu.FlashSize.4M3M.upload.maximum_size=1044464
 nodemcu.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 nodemcu.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 nodemcu.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-nodemcu.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-nodemcu.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-nodemcu.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-nodemcu.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+nodemcu.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+nodemcu.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+nodemcu.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+nodemcu.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+nodemcu.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+nodemcu.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+nodemcu.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+nodemcu.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+nodemcu.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 nodemcu.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 nodemcu.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-nodemcu.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-nodemcu.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-nodemcu.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-nodemcu.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+nodemcu.menu.LwIPVariant.OpenSource=v1.4 Open Source
 nodemcu.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 nodemcu.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 nodemcu.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1353,16 +1371,18 @@ nodemcuv2.menu.FlashSize.4M3M.upload.maximum_size=1044464
 nodemcuv2.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 nodemcuv2.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 nodemcuv2.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-nodemcuv2.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-nodemcuv2.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-nodemcuv2.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-nodemcuv2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+nodemcuv2.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+nodemcuv2.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+nodemcuv2.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+nodemcuv2.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+nodemcuv2.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+nodemcuv2.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+nodemcuv2.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+nodemcuv2.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+nodemcuv2.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 nodemcuv2.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 nodemcuv2.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-nodemcuv2.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-nodemcuv2.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-nodemcuv2.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-nodemcuv2.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+nodemcuv2.menu.LwIPVariant.OpenSource=v1.4 Open Source
 nodemcuv2.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 nodemcuv2.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 nodemcuv2.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1468,16 +1488,18 @@ modwifi.menu.FlashSize.2M.upload.maximum_size=1044464
 modwifi.menu.FlashSize.2M.build.spiffs_start=0x100000
 modwifi.menu.FlashSize.2M.build.spiffs_end=0x1FB000
 modwifi.menu.FlashSize.2M.build.spiffs_blocksize=8192
-modwifi.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-modwifi.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-modwifi.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-modwifi.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+modwifi.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+modwifi.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+modwifi.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+modwifi.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+modwifi.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+modwifi.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+modwifi.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+modwifi.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+modwifi.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 modwifi.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 modwifi.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-modwifi.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-modwifi.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-modwifi.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-modwifi.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+modwifi.menu.LwIPVariant.OpenSource=v1.4 Open Source
 modwifi.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 modwifi.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 modwifi.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1596,16 +1618,18 @@ thing.menu.FlashSize.512K128.upload.maximum_size=368624
 thing.menu.FlashSize.512K128.build.spiffs_start=0x5B000
 thing.menu.FlashSize.512K128.build.spiffs_end=0x7B000
 thing.menu.FlashSize.512K128.build.spiffs_blocksize=4096
-thing.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-thing.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-thing.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-thing.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+thing.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+thing.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+thing.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+thing.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+thing.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+thing.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+thing.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+thing.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+thing.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 thing.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 thing.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-thing.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-thing.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-thing.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-thing.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+thing.menu.LwIPVariant.OpenSource=v1.4 Open Source
 thing.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 thing.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 thing.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1724,16 +1748,18 @@ thingdev.menu.FlashSize.512K128.upload.maximum_size=368624
 thingdev.menu.FlashSize.512K128.build.spiffs_start=0x5B000
 thingdev.menu.FlashSize.512K128.build.spiffs_end=0x7B000
 thingdev.menu.FlashSize.512K128.build.spiffs_blocksize=4096
-thingdev.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-thingdev.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-thingdev.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-thingdev.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+thingdev.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+thingdev.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+thingdev.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+thingdev.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+thingdev.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+thingdev.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+thingdev.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+thingdev.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+thingdev.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 thingdev.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 thingdev.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-thingdev.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-thingdev.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-thingdev.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-thingdev.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+thingdev.menu.LwIPVariant.OpenSource=v1.4 Open Source
 thingdev.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 thingdev.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 thingdev.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1847,16 +1873,18 @@ esp210.menu.FlashSize.4M3M.upload.maximum_size=1044464
 esp210.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 esp210.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 esp210.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-esp210.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-esp210.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-esp210.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-esp210.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+esp210.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+esp210.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+esp210.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+esp210.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+esp210.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+esp210.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+esp210.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+esp210.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+esp210.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 esp210.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 esp210.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-esp210.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-esp210.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-esp210.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-esp210.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+esp210.menu.LwIPVariant.OpenSource=v1.4 Open Source
 esp210.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 esp210.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 esp210.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -1970,16 +1998,18 @@ d1_mini.menu.FlashSize.4M3M.upload.maximum_size=1044464
 d1_mini.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 d1_mini.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 d1_mini.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-d1_mini.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-d1_mini.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-d1_mini.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-d1_mini.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+d1_mini.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+d1_mini.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+d1_mini.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+d1_mini.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+d1_mini.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+d1_mini.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+d1_mini.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+d1_mini.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+d1_mini.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 d1_mini.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 d1_mini.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-d1_mini.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-d1_mini.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-d1_mini.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-d1_mini.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+d1_mini.menu.LwIPVariant.OpenSource=v1.4 Open Source
 d1_mini.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 d1_mini.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 d1_mini.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2085,16 +2115,18 @@ d1_mini_pro.menu.FlashSize.16M15M.upload.maximum_size=1044464
 d1_mini_pro.menu.FlashSize.16M15M.build.spiffs_start=0x100000
 d1_mini_pro.menu.FlashSize.16M15M.build.spiffs_end=0xFFB000
 d1_mini_pro.menu.FlashSize.16M15M.build.spiffs_blocksize=8192
-d1_mini_pro.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-d1_mini_pro.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-d1_mini_pro.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-d1_mini_pro.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+d1_mini_pro.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+d1_mini_pro.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+d1_mini_pro.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+d1_mini_pro.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+d1_mini_pro.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+d1_mini_pro.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+d1_mini_pro.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+d1_mini_pro.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+d1_mini_pro.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 d1_mini_pro.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 d1_mini_pro.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-d1_mini_pro.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-d1_mini_pro.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-d1_mini_pro.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-d1_mini_pro.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+d1_mini_pro.menu.LwIPVariant.OpenSource=v1.4 Open Source
 d1_mini_pro.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 d1_mini_pro.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 d1_mini_pro.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2253,16 +2285,18 @@ d1_mini_lite.menu.FlashSize.1M512.upload.maximum_size=499696
 d1_mini_lite.menu.FlashSize.1M512.build.spiffs_start=0x7B000
 d1_mini_lite.menu.FlashSize.1M512.build.spiffs_end=0xFB000
 d1_mini_lite.menu.FlashSize.1M512.build.spiffs_blocksize=8192
-d1_mini_lite.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-d1_mini_lite.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-d1_mini_lite.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-d1_mini_lite.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+d1_mini_lite.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+d1_mini_lite.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+d1_mini_lite.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+d1_mini_lite.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+d1_mini_lite.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+d1_mini_lite.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+d1_mini_lite.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+d1_mini_lite.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+d1_mini_lite.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 d1_mini_lite.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 d1_mini_lite.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-d1_mini_lite.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-d1_mini_lite.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-d1_mini_lite.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-d1_mini_lite.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+d1_mini_lite.menu.LwIPVariant.OpenSource=v1.4 Open Source
 d1_mini_lite.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 d1_mini_lite.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 d1_mini_lite.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2376,16 +2410,18 @@ d1.menu.FlashSize.4M3M.upload.maximum_size=1044464
 d1.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 d1.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 d1.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-d1.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-d1.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-d1.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-d1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+d1.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+d1.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+d1.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+d1.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+d1.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+d1.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+d1.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+d1.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+d1.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 d1.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 d1.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-d1.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-d1.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-d1.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-d1.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+d1.menu.LwIPVariant.OpenSource=v1.4 Open Source
 d1.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 d1.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 d1.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2502,16 +2538,18 @@ espino.menu.FlashSize.4M3M.upload.maximum_size=1044464
 espino.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 espino.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 espino.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-espino.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-espino.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-espino.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-espino.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+espino.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+espino.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+espino.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+espino.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+espino.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+espino.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+espino.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+espino.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+espino.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 espino.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 espino.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-espino.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-espino.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-espino.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-espino.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+espino.menu.LwIPVariant.OpenSource=v1.4 Open Source
 espino.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 espino.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 espino.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2625,16 +2663,18 @@ espinotee.menu.FlashSize.4M3M.upload.maximum_size=1044464
 espinotee.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 espinotee.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 espinotee.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-espinotee.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-espinotee.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-espinotee.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-espinotee.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+espinotee.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+espinotee.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+espinotee.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+espinotee.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+espinotee.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+espinotee.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+espinotee.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+espinotee.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+espinotee.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 espinotee.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 espinotee.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-espinotee.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-espinotee.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-espinotee.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-espinotee.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+espinotee.menu.LwIPVariant.OpenSource=v1.4 Open Source
 espinotee.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 espinotee.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 espinotee.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2812,16 +2852,18 @@ wifinfo.menu.FlashSize.1M512.upload.maximum_size=499696
 wifinfo.menu.FlashSize.1M512.build.spiffs_start=0x7B000
 wifinfo.menu.FlashSize.1M512.build.spiffs_end=0xFB000
 wifinfo.menu.FlashSize.1M512.build.spiffs_blocksize=8192
-wifinfo.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-wifinfo.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-wifinfo.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-wifinfo.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+wifinfo.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+wifinfo.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+wifinfo.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+wifinfo.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+wifinfo.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+wifinfo.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+wifinfo.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+wifinfo.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+wifinfo.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 wifinfo.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 wifinfo.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-wifinfo.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-wifinfo.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-wifinfo.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-wifinfo.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+wifinfo.menu.LwIPVariant.OpenSource=v1.4 Open Source
 wifinfo.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 wifinfo.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 wifinfo.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -2946,16 +2988,18 @@ arduino-esp8266.menu.FlashSize.4M3M.upload.maximum_size=1044464
 arduino-esp8266.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 arduino-esp8266.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 arduino-esp8266.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-arduino-esp8266.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-arduino-esp8266.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-arduino-esp8266.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-arduino-esp8266.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+arduino-esp8266.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+arduino-esp8266.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+arduino-esp8266.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+arduino-esp8266.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+arduino-esp8266.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+arduino-esp8266.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+arduino-esp8266.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+arduino-esp8266.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+arduino-esp8266.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 arduino-esp8266.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 arduino-esp8266.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-arduino-esp8266.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-arduino-esp8266.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-arduino-esp8266.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-arduino-esp8266.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+arduino-esp8266.menu.LwIPVariant.OpenSource=v1.4 Open Source
 arduino-esp8266.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 arduino-esp8266.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 arduino-esp8266.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -3074,16 +3118,18 @@ gen4iod.menu.FlashSize.512K128.upload.maximum_size=368624
 gen4iod.menu.FlashSize.512K128.build.spiffs_start=0x5B000
 gen4iod.menu.FlashSize.512K128.build.spiffs_end=0x7B000
 gen4iod.menu.FlashSize.512K128.build.spiffs_blocksize=4096
-gen4iod.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-gen4iod.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-gen4iod.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-gen4iod.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+gen4iod.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+gen4iod.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+gen4iod.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+gen4iod.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+gen4iod.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+gen4iod.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+gen4iod.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+gen4iod.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+gen4iod.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 gen4iod.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 gen4iod.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-gen4iod.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-gen4iod.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-gen4iod.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-gen4iod.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+gen4iod.menu.LwIPVariant.OpenSource=v1.4 Open Source
 gen4iod.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 gen4iod.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 gen4iod.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
@@ -3197,16 +3243,18 @@ oak.menu.FlashSize.4M3M.upload.maximum_size=1044464
 oak.menu.FlashSize.4M3M.build.spiffs_start=0x100000
 oak.menu.FlashSize.4M3M.build.spiffs_end=0x3FB000
 oak.menu.FlashSize.4M3M.build.spiffs_blocksize=8192
-oak.menu.LwIPVariant.open=v2 Prebuilt (gcc)
-oak.menu.LwIPVariant.open.build.lwip_include=lwip2/include
-oak.menu.LwIPVariant.open.build.lwip_lib=-llwip2
-oak.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt (gcc)
+oak.menu.LwIPVariant.v2mss536=v2 Prebuilt (MSS=536)
+oak.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+oak.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+oak.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+oak.menu.LwIPVariant.v2mss1460=v2 Prebuilt (MSS=1460, unstable)
+oak.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+oak.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+oak.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+oak.menu.LwIPVariant.Prebuilt=v1.4 Prebuilt
 oak.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
 oak.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
-oak.menu.LwIPVariant.Espressif=v1.4 Espressif (xcc)
-oak.menu.LwIPVariant.Espressif.build.lwip_lib=-llwip
-oak.menu.LwIPVariant.Espressif.build.lwip_flags=-DLWIP_MAYBE_XCC
-oak.menu.LwIPVariant.OpenSource=v1.4 Open Source (gcc)
+oak.menu.LwIPVariant.OpenSource=v1.4 Open Source
 oak.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
 oak.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
 oak.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
diff --git a/tools/sdk/ld/eagle.app.v6.common.ld b/tools/sdk/ld/eagle.app.v6.common.ld
index f6e1ddd4dc..00f731c4e4 100644
--- a/tools/sdk/ld/eagle.app.v6.common.ld
+++ b/tools/sdk/ld/eagle.app.v6.common.ld
@@ -178,6 +178,7 @@ SECTIONS
     *liblwip_gcc.a:(.literal .text .literal.* .text.*)
     *liblwip_src.a:(.literal .text .literal.* .text.*)
     *liblwip2.a:(.literal .text .literal.* .text.*)
+    *liblwip2_1460.a:(.literal .text .literal.* .text.*)
     *libaxtls.a:(.literal .text .literal.* .text.*)
     *libat.a:(.literal.* .text.*)
     *libcrypto.a:(.literal.* .text.*)
diff --git a/tools/sdk/lib/liblwip2.a b/tools/sdk/lib/liblwip2.a
index ad0064ef82..b7ae173fa1 100644
Binary files a/tools/sdk/lib/liblwip2.a and b/tools/sdk/lib/liblwip2.a differ
diff --git a/tools/sdk/lib/liblwip2_1460.a b/tools/sdk/lib/liblwip2_1460.a
new file mode 100644
index 0000000000..d86ae97d2b
Binary files /dev/null and b/tools/sdk/lib/liblwip2_1460.a differ
diff --git a/tools/sdk/lwip2/Makefile b/tools/sdk/lwip2/Makefile
index 451b48979f..6284486a7c 100644
--- a/tools/sdk/lwip2/Makefile
+++ b/tools/sdk/lwip2/Makefile
@@ -2,5 +2,7 @@
 all install clean: builder/lwip2-src/README
 	make -C builder -f Makefile.arduino $@
 
+download: builder/lwip2-src/README
+
 builder/lwip2-src/README:
 	git submodule update --init --recursive builder
diff --git a/tools/sdk/lwip2/README.md b/tools/sdk/lwip2/README.md
new file mode 100644
index 0000000000..cb6b2d793b
--- /dev/null
+++ b/tools/sdk/lwip2/README.md
@@ -0,0 +1,10 @@
+
+make install	download, compile, install lwip2
+make download	download lwIP-2 builder
+make clean	clean builder only
+
+glue and lwIP debug options are in builder/glue/gluedebug.h
+MSS values are in builder/Makefile.arduino
+MSS values in boards.txt are only informative
+
+current lwip2 submodule repository: https://github.com/d-a-v/esp82xx-nonos-linklayer/tree/arduino-2.4.0
diff --git a/tools/sdk/lwip2/builder b/tools/sdk/lwip2/builder
index 693bfddbe2..6f41898808 160000
--- a/tools/sdk/lwip2/builder
+++ b/tools/sdk/lwip2/builder
@@ -1 +1 @@
-Subproject commit 693bfddbe274ade1b7aec731e8c688c073b976c5
+Subproject commit 6f418988085a7d30eee5ddfcad961de461e4aa60
diff --git a/tools/sdk/lwip2/include/lwipopts.h b/tools/sdk/lwip2/include/lwipopts.h
index 55d25072de..9d365498d6 100644
--- a/tools/sdk/lwip2/include/lwipopts.h
+++ b/tools/sdk/lwip2/include/lwipopts.h
@@ -1050,7 +1050,7 @@
 
 /** DNS maximum host name length supported in the name table. */
 #if !defined DNS_MAX_NAME_LENGTH || defined __DOXYGEN__
-#define DNS_MAX_NAME_LENGTH             48 // 256
+#define DNS_MAX_NAME_LENGTH             128 // 256
 #endif
 
 /** The maximum of DNS servers
@@ -1214,9 +1214,9 @@
  * when opening a connection. For the transmit size, this MSS sets
  * an upper limit on the MSS advertised by the remote host.
  */
-#if !defined TCP_MSS || defined __DOXYGEN__
-#define TCP_MSS                         536
-#endif
+//#if !defined TCP_MSS || defined __DOXYGEN__
+//#define TCP_MSS                         536
+//#endif
 
 /**
  * TCP_CALCULATE_EFF_SEND_MSS: "The maximum size of a segment that TCP really
@@ -1312,7 +1312,7 @@
  * TCP_MSS/4: Try to create 4 fragments or less per TCP packet.
  */
 #if !defined TCP_OVERSIZE || defined __DOXYGEN__
-#define TCP_OVERSIZE                    TCP_MSS
+#define TCP_OVERSIZE                    TCP_MSS	// TCP_MSS is STRONGLY SUGGESTED FOR ESP8266 BLOBS !!
 #endif
 
 /**
@@ -1506,7 +1506,7 @@
  * @todo: TCP and IP-frag do not work with this, yet:
  */
 #if !defined LWIP_NETIF_TX_SINGLE_PBUF || defined __DOXYGEN__
-#define LWIP_NETIF_TX_SINGLE_PBUF             1 // MANDATORY FOR ESP8266 BLOBS !! 
+#define LWIP_NETIF_TX_SINGLE_PBUF             1 // 1 is STRONGLY SUGGESTED FOR ESP8266 BLOBS !!
 #endif /* LWIP_NETIF_TX_SINGLE_PBUF */
 
 /**
@@ -2990,7 +2990,7 @@
 // so we do not define it. sntp server can come from dhcp server, or by
 // user.
 //#define SNTP_SERVER_ADDRESS	"pool.ntp.org"			// default
-#define SNTP_GET_SERVERS_FROM_DHCP	1
+#define SNTP_GET_SERVERS_FROM_DHCP	3
 #define SNTP_SET_SYSTEM_TIME_US(t,us)	do { struct timeval tv = { t, us }; settimeofday(&tv, NULL); } while (0)
 
 /*