diff --git a/configs/sim/nettest/defconfig b/configs/sim/nettest/defconfig
index c4fb7cfb2a1..d2c5a47db3b 100755
--- a/configs/sim/nettest/defconfig
+++ b/configs/sim/nettest/defconfig
@@ -17,6 +17,7 @@ CONFIG_HOST_LINUX=y
 # Build Configuration
 #
 # CONFIG_APPS_DIR="../apps"
+CONFIG_BUILD_FLAT=y
 # CONFIG_BUILD_2PASS is not set
 
 #
@@ -41,8 +42,8 @@ CONFIG_HOST_LINUX=y
 # Debug Options
 #
 # CONFIG_DEBUG is not set
-# CONFIG_ARCH_HAVE_STACKCHECK is not set
 # CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_ARCH_HAVE_STACKCHECK is not set
 # CONFIG_DEBUG_SYMBOLS is not set
 # CONFIG_ARCH_HAVE_CUSTOMOPT is not set
 # CONFIG_DEBUG_NOOPT is not set
@@ -67,8 +68,12 @@ CONFIG_ARCH="sim"
 #
 # Simulation Configuration Options
 #
+CONFIG_HOST_X86_64=y
+# CONFIG_HOST_X86 is not set
 # CONFIG_SIM_M32 is not set
 # CONFIG_SIM_WALLTIME is not set
+# CONFIG_SIM_FRAMEBUFFER is not set
+# CONFIG_SIM_SPIFLASH is not set
 
 #
 # Architecture Options
@@ -77,9 +82,13 @@ CONFIG_ARCH="sim"
 # CONFIG_ARCH_VECNOTIRQ is not set
 # CONFIG_ARCH_DMA is not set
 # CONFIG_ARCH_HAVE_IRQPRIO is not set
-# CONFIG_ARCH_ADDRENV is not set
+# CONFIG_ARCH_L2CACHE is not set
+# CONFIG_ARCH_HAVE_COHERENT_DCACHE is not set
+# CONFIG_ARCH_HAVE_ADDRENV is not set
+# CONFIG_ARCH_NEED_ADDRENV_MAPPING is not set
 # CONFIG_ARCH_HAVE_VFORK is not set
 # CONFIG_ARCH_HAVE_MMU is not set
+# CONFIG_ARCH_HAVE_MPU is not set
 # CONFIG_ARCH_NAND_HWECC is not set
 # CONFIG_ARCH_HAVE_EXTCLK is not set
 # CONFIG_ARCH_STACKDUMP is not set
@@ -144,6 +153,8 @@ CONFIG_DISABLE_OS_API=y
 #
 # Clocks and Timers
 #
+CONFIG_ARCH_HAVE_TICKLESS=y
+# CONFIG_SCHED_TICKLESS is not set
 CONFIG_USEC_PER_TICK=10000
 # CONFIG_SYSTEM_TIME64 is not set
 # CONFIG_CLOCK_MONOTONIC is not set
@@ -159,6 +170,9 @@ CONFIG_PREALLOC_TIMERS=8
 #
 # Tasks and Scheduling
 #
+# CONFIG_INIT_NONE is not set
+CONFIG_INIT_ENTRYPOINT=y
+# CONFIG_INIT_FILEPATH is not set
 CONFIG_USER_ENTRYPOINT="nettest_main"
 CONFIG_RR_INTERVAL=0
 CONFIG_TASK_NAME_SIZE=31
@@ -212,6 +226,13 @@ CONFIG_SIG_SIGCONDTIMEDOUT=16
 CONFIG_PREALLOC_MQ_MSGS=32
 CONFIG_MQ_MAXMSGSIZE=32
 
+#
+# Work Queue Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_SCHED_HPWORK is not set
+# CONFIG_SCHED_LPWORK is not set
+
 #
 # Stack and heap information
 #
@@ -219,6 +240,7 @@ CONFIG_IDLETHREAD_STACKSIZE=4096
 CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
+# CONFIG_LIB_SYSCALL is not set
 
 #
 # Device Drivers
@@ -252,6 +274,7 @@ CONFIG_DEV_NULL=y
 # CONFIG_LCD is not set
 # CONFIG_MMCSD is not set
 # CONFIG_MTD is not set
+# CONFIG_EEPROM is not set
 # CONFIG_NETDEVICES is not set
 # CONFIG_NET_SLIP is not set
 # CONFIG_PIPES is not set
@@ -283,6 +306,7 @@ CONFIG_SERIAL=y
 # CONFIG_ARCH_HAVE_USART6 is not set
 # CONFIG_ARCH_HAVE_USART7 is not set
 # CONFIG_ARCH_HAVE_USART8 is not set
+# CONFIG_ARCH_HAVE_OTHER_UART is not set
 
 #
 # USART Configuration
@@ -291,6 +315,7 @@ CONFIG_SERIAL=y
 # CONFIG_STANDARD_SERIAL is not set
 # CONFIG_SERIAL_IFLOWCONTROL is not set
 # CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_ARCH_HAVE_SERIAL_TERMIOS is not set
 # CONFIG_USBDEV is not set
 # CONFIG_USBHOST is not set
 # CONFIG_WIRELESS is not set
@@ -311,13 +336,33 @@ CONFIG_ARCH_HAVE_NET=y
 # CONFIG_ARCH_HAVE_PHY is not set
 CONFIG_NET=y
 # CONFIG_NET_NOINTS is not set
-CONFIG_NET_IPv4=y
-# CONFIG_NET_MULTIBUFFER is not set
 # CONFIG_NET_PROMISCUOUS is not set
-CONFIG_NET_ETH_MTU=562
+
+#
+# Driver buffer configuration
+#
+# CONFIG_NET_MULTIBUFFER is not set
+CONFIG_NET_ETH_MTU=590
 CONFIG_NET_ETH_TCP_RECVWNDO=536
 CONFIG_NET_GUARDSIZE=2
 
+#
+# Data link support
+#
+# CONFIG_NET_MULTILINK is not set
+CONFIG_NET_ETHERNET=y
+
+#
+# Network Device Operations
+#
+# CONFIG_NETDEV_PHY_IOCTL is not set
+
+#
+# Internet Protocol Selection
+#
+CONFIG_NET_IPv4=y
+# CONFIG_NET_IPv6 is not set
+
 #
 # Socket Support
 #
@@ -326,16 +371,16 @@ CONFIG_NET_NACTIVESOCKETS=16
 CONFIG_NET_SOCKOPTS=y
 # CONFIG_NET_SOLINGER is not set
 
-#
-# Network Device Operations
-#
-# CONFIG_NETDEV_PHY_IOCTL is not set
-
 #
 # Raw Socket Support
 #
 # CONFIG_NET_PKT is not set
 
+#
+# Unix Domain Socket Support
+#
+# CONFIG_NET_LOCAL is not set
+
 #
 # TCP/IP Networking
 #
@@ -374,6 +419,7 @@ CONFIG_NET_ARP=y
 CONFIG_NET_ARPTAB_SIZE=16
 CONFIG_NET_ARP_MAXAGE=120
 # CONFIG_NET_ARP_IPIN is not set
+# CONFIG_NET_ARP_SEND is not set
 
 #
 # Network I/O Buffer Support
@@ -390,7 +436,6 @@ CONFIG_NET_STATISTICS=y
 # Routing Table Configuration
 #
 # CONFIG_NET_ROUTE is not set
-CONFIG_NET_ETHERNET=y
 
 #
 # Crypto API
@@ -405,9 +450,12 @@ CONFIG_NET_ETHERNET=y
 # File system configuration
 #
 # CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_FS_AUTOMOUNTER is not set
 # CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
 CONFIG_FS_READABLE=y
 CONFIG_FS_WRITABLE=y
+# CONFIG_FS_NAMED_SEMAPHORES is not set
+CONFIG_FS_MQUEUE_MPATH="/var/mqueue"
 # CONFIG_FS_RAMMAP is not set
 CONFIG_FS_FAT=y
 # CONFIG_FAT_LCNAMES is not set
@@ -423,8 +471,8 @@ CONFIG_FS_FAT=y
 #
 # System Logging
 #
-
 # CONFIG_SYSLOG is not set
+# CONFIG_SYSLOG_TIMESTAMP is not set
 
 #
 # Graphics Support
@@ -445,7 +493,7 @@ CONFIG_MM_REGIONS=1
 # CONFIG_AUDIO is not set
 
 #
-# Binary Formats
+# Binary Loader
 #
 # CONFIG_BINFMT_DISABLE is not set
 # CONFIG_BINFMT_EXEPATH is not set
@@ -469,6 +517,7 @@ CONFIG_LIB_HOMEDIR="/"
 # CONFIG_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
+# CONFIG_LIBC_IOCTL_VARIADIC is not set
 CONFIG_LIB_RAND_ORDER=1
 # CONFIG_EOL_IS_CR is not set
 # CONFIG_EOL_IS_LF is not set
@@ -479,7 +528,10 @@ CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
 CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
 # CONFIG_LIBC_STRERROR is not set
 # CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_LIBC_TMPDIR="/tmp"
+CONFIG_LIBC_MAX_TMPFILE=32
 CONFIG_ARCH_LOWPUTC=y
+# CONFIG_LIBC_LOCALTIME is not set
 CONFIG_LIB_SENDFILE_BUFSIZE=512
 # CONFIG_ARCH_ROMGETC is not set
 # CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
@@ -487,7 +539,6 @@ CONFIG_LIB_SENDFILE_BUFSIZE=512
 #
 # Non-standard Library Support
 #
-# CONFIG_SCHED_WORKQUEUE is not set
 # CONFIG_LIB_KBDCODEC is not set
 # CONFIG_LIB_SLCDCODEC is not set
 
@@ -529,6 +580,11 @@ CONFIG_EXAMPLES_NETTEST=y
 # CONFIG_EXAMPLES_NETTEST_SERVER is not set
 # CONFIG_EXAMPLES_NETTEST_PERFORMANCE is not set
 # CONFIG_EXAMPLES_NETTEST_NOMAC is not set
+CONFIG_EXAMPLES_NETTEST_IPv4=y
+
+#
+# IPv4 addresses
+#
 CONFIG_EXAMPLES_NETTEST_IPADDR=0xc0a80080
 CONFIG_EXAMPLES_NETTEST_DRIPADDR=0xc0a80001
 CONFIG_EXAMPLES_NETTEST_NETMASK=0xffffff00
@@ -562,7 +618,6 @@ CONFIG_EXAMPLES_NETTEST_CLIENTIP=0xc0a8006a
 # CONFIG_EXAMPLES_THTTPD is not set
 # CONFIG_EXAMPLES_TIFF is not set
 # CONFIG_EXAMPLES_TOUCHSCREEN is not set
-# CONFIG_EXAMPLES_UDP is not set
 # CONFIG_EXAMPLES_WEBSERVER is not set
 # CONFIG_EXAMPLES_USBSERIAL is not set
 # CONFIG_EXAMPLES_USBTERM is not set
@@ -573,12 +628,15 @@ CONFIG_EXAMPLES_NETTEST_CLIENTIP=0xc0a8006a
 # Graphics Support
 #
 # CONFIG_TIFF is not set
+# CONFIG_GRAPHICS_TRAVELER is not set
 
 #
 # Interpreters
 #
+# CONFIG_INTERPRETERS_BAS is not set
 # CONFIG_INTERPRETERS_FICL is not set
 # CONFIG_INTERPRETERS_PCODE is not set
+# CONFIG_INTERPRETERS_MICROPYTHON is not set
 
 #
 # Network Utilities
@@ -634,6 +692,11 @@ CONFIG_NETUTILS_NETLIB=y
 #
 # CONFIG_SYSTEM_CLE is not set
 
+#
+# CU Minimal Terminal
+#
+# CONFIG_SYSTEM_CUTERM is not set
+
 #
 # FLASH Program Installation
 #
@@ -660,7 +723,6 @@ CONFIG_NETUTILS_NETLIB=y
 #
 # NxPlayer media player library / command Line
 #
-# CONFIG_SYSTEM_NXPLAYER is not set
 
 #
 # RAM test
@@ -695,11 +757,20 @@ CONFIG_NETUTILS_NETLIB=y
 #
 # CONFIG_SYSTEM_SDCARD is not set
 
+#
+# Sudoku
+#
+# CONFIG_SYSTEM_SUDOKU is not set
+
 #
 # Sysinfo
 #
 # CONFIG_SYSTEM_SYSINFO is not set
 
+#
+# Temperature
+#
+
 #
 # VI Work-Alike Editor
 #