diff --git a/boards/sim/sim/sim/configs/dynconns/defconfig b/boards/sim/sim/sim/configs/dynconns/defconfig
new file mode 100644
index 00000000000..5696467dfdd
--- /dev/null
+++ b/boards/sim/sim/sim/configs/dynconns/defconfig
@@ -0,0 +1,86 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ALLOW_BSD_COMPONENTS=y
+CONFIG_ARCH="sim"
+CONFIG_ARCH_BOARD="sim"
+CONFIG_ARCH_BOARD_SIM=y
+CONFIG_ARCH_CHIP="sim"
+CONFIG_ARCH_SIM=y
+CONFIG_BINFMT_DISABLE=y
+CONFIG_BOARDCTL_POWEROFF=y
+CONFIG_BOARDCTL_ROMDISK=y
+CONFIG_BOARD_LOOPSPERMSEC=0
+CONFIG_BOOT_RUNFROMEXTSRAM=y
+CONFIG_BUILTIN=y
+CONFIG_CLOCK_MONOTONIC=y
+CONFIG_DEV_LOOP=y
+CONFIG_DEV_ZERO=y
+CONFIG_FSUTILS_PASSWD=y
+CONFIG_FSUTILS_PASSWD_READONLY=y
+CONFIG_FS_ROMFS=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_IOB_NOTIFIER=y
+CONFIG_LIBC_DLFCN=y
+CONFIG_LIBC_ENVPATH=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_MM_FILL_ALLOCATIONS=y
+CONFIG_NAME_MAX=64
+CONFIG_NET=y
+CONFIG_NETDB_DNSCLIENT=y
+CONFIG_NETDEV_PHY_IOCTL=y
+CONFIG_NETDOWN_NOTIFIER=y
+CONFIG_NETLINK_ROUTE=y
+CONFIG_NET_ALLOC_CONNS=y
+CONFIG_NET_ARP_SEND=y
+CONFIG_NET_BLUETOOTH=y
+CONFIG_NET_BROADCAST=y
+CONFIG_NET_CAN=y
+CONFIG_NET_ICMP=y
+CONFIG_NET_ICMP_SOCKET=y
+CONFIG_NET_ICMPv6=y
+CONFIG_NET_ICMPv6_AUTOCONF=y
+CONFIG_NET_ICMPv6_NEIGHBOR=y
+CONFIG_NET_ICMPv6_ROUTER=y
+CONFIG_NET_ICMPv6_SOCKET=y
+CONFIG_NET_IEEE802154=y
+CONFIG_NET_IPv6=y
+CONFIG_NET_LOCAL=y
+CONFIG_NET_NETLINK=y
+CONFIG_NET_PKT=y
+CONFIG_NET_PROMISCUOUS=y
+CONFIG_NET_STATISTICS=y
+CONFIG_NET_TCP=y
+CONFIG_NET_TCP_NOTIFIER=y
+CONFIG_NET_TCP_WRITE_BUFFERS=y
+CONFIG_NET_UDP=y
+CONFIG_NET_UDP_NOTIFIER=y
+CONFIG_NET_USRSOCK=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_LINELEN=200
+CONFIG_NSH_READLINE=y
+CONFIG_READLINE_TABCOMPLETION=y
+CONFIG_RTC=y
+CONFIG_RTC_ARCH=y
+CONFIG_RTC_DATETIME=y
+CONFIG_RTC_DRIVER=y
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_ONEXIT=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SIG_DEFAULT=y
+CONFIG_SIM_NETDEV=y
+CONFIG_START_MONTH=6
+CONFIG_START_YEAR=2008
+CONFIG_STDIO_DISABLE_BUFFERING=y
+CONFIG_SYSLOG_CONSOLE=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_WIRELESS=y
+CONFIG_WIRELESS_BLUETOOTH=y
+CONFIG_WIRELESS_IEEE802154=y