diff --git a/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig b/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
index fbd46d77f8e..22992a1ff96 100644
--- a/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
+++ b/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
@@ -32,6 +32,7 @@ CONFIG_BUILTIN=y
 CONFIG_C99_BOOL8=y
 CONFIG_CODECS_HASH_MD5=y
 CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_HARDFAULT_ALERT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEV_ZERO=y
 CONFIG_DISABLE_POSIX_TIMERS=y
@@ -42,6 +43,8 @@ CONFIG_ELF=y
 CONFIG_EXAMPLES_HELLO=m
 CONFIG_EXAMPLES_HELLOXX=m
 CONFIG_EXAMPLES_I2SLOOP=y
+CONFIG_EXAMPLES_IPERF=y
+CONFIG_EXAMPLES_IPERFTEST_DEVNAME="eth0"
 CONFIG_EXAMPLES_NXHELLO=y
 CONFIG_EXAMPLES_NXHELLO_BPP=1
 CONFIG_EXAMPLES_PIPE=y
@@ -59,9 +62,7 @@ CONFIG_I2CTOOL_MAXBUS=1
 CONFIG_I2C_RESET=y
 CONFIG_I2S=y
 CONFIG_INTELHEX_BINARY=y
-CONFIG_IOB_BUFSIZE=64
-CONFIG_IOB_NBUFFERS=64
-CONFIG_IOB_NCHAINS=20
+CONFIG_IOB_NBUFFERS=128
 CONFIG_LC823450_I2C0=y
 CONFIG_LC823450_I2C1=y
 CONFIG_LC823450_I2S0=y
@@ -84,7 +85,6 @@ CONFIG_NAME_MAX=765
 CONFIG_NET=y
 CONFIG_NETDB_DNSCLIENT=y
 CONFIG_NETDEVICES=y
-CONFIG_NETINIT_DHCPC=y
 CONFIG_NETINIT_DRIPADDR=0xa9feab5a
 CONFIG_NETINIT_MACADDR_1=0xdeadbeff
 CONFIG_NETINIT_NETMASK=0xffff0000
@@ -96,7 +96,7 @@ CONFIG_NETUTILS_TELNETD=y
 CONFIG_NETUTILS_WEBCLIENT=y
 CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
-CONFIG_NET_ETH_PKTSIZE=1500
+CONFIG_NET_ETH_PKTSIZE=1514
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
 CONFIG_NET_LOOPBACK=y
@@ -104,6 +104,7 @@ CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
+CONFIG_NET_TCP_WRITE_BUFFERS=y
 CONFIG_NET_UDP=y
 CONFIG_NET_UDP_BINDTODEVICE=y
 CONFIG_NFILE_DESCRIPTORS=45
@@ -153,7 +154,6 @@ CONFIG_SCHED_HAVE_PARENT=y
 CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_INSTRUMENTATION=y
-CONFIG_SCHED_INSTRUMENTATION_PREEMPTION=y
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=60
 CONFIG_SCHED_ONEXIT=y
@@ -183,6 +183,7 @@ CONFIG_SYSTEM_TASKSET=y
 CONFIG_SYSTEM_TIME64=y
 CONFIG_TASK_NAME_SIZE=24
 CONFIG_TELNET_CHARACTER_MODE=y
+CONFIG_TESTING_GETPRIME=y
 CONFIG_TESTING_OSTEST=y
 CONFIG_TESTING_SMP=y
 CONFIG_UART0_RXBUFSIZE=512