diff --git a/boards/arm/cxd56xx/spresense/configs/rndis/defconfig b/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
index d2c019c98d3..20407fcb98e 100644
--- a/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
@@ -25,7 +25,9 @@ CONFIG_BOOT_RUNFROMISRAM=y
 CONFIG_BUILTIN=y
 CONFIG_CLOCK_MONOTONIC=y
 CONFIG_CODECS_HASH_MD5=y
-CONFIG_CXD56_AUDIO_NUM_BUFFERS=16
+CONFIG_CXD56_AUDIO_BUFFER_SIZE=2048
+CONFIG_CXD56_AUDIO_NUM_BUFFERS=32
+CONFIG_CXD56_AUDIO_WORKER_STACKSIZE=1024
 CONFIG_CXD56_BINARY=y
 CONFIG_CXD56_SDIO=y
 CONFIG_CXD56_USBDEV=y
@@ -36,6 +38,12 @@ CONFIG_ELF=y
 CONFIG_EXAMPLES_FTPC=y
 CONFIG_EXAMPLES_FTPD=y
 CONFIG_EXAMPLES_HELLO=m
+CONFIG_EXAMPLES_TCPBLASTER=y
+CONFIG_EXAMPLES_TCPBLASTER_GROUPSIZE=500
+CONFIG_EXAMPLES_TCPBLASTER_SENDSIZE=1400
+CONFIG_EXAMPLES_TCPBLASTER_SERVER=y
+CONFIG_EXAMPLES_TCPBLASTER_SERVERIP=0x0a00010f
+CONFIG_EXAMPLES_TCPBLASTER_TARGET2=y
 CONFIG_EXAMPLES_WEBSERVER=y
 CONFIG_FAT_LCNAMES=y
 CONFIG_FAT_LFN=y
@@ -49,9 +57,6 @@ CONFIG_FTP_TMPDIR="/mnt/sd0"
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
 CONFIG_I2C=y
-CONFIG_IOB_BUFSIZE=64
-CONFIG_IOB_NBUFFERS=64
-CONFIG_IOB_NCHAINS=20
 CONFIG_LIBC_EXECFUNCS=y
 CONFIG_LIBM=y
 CONFIG_LIB_ENVPATH=y
@@ -90,6 +95,7 @@ CONFIG_NET_ROUTE=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
 CONFIG_NET_TCPBACKLOG=y
+CONFIG_NET_TCP_WRITE_BUFFERS=y
 CONFIG_NET_UDP=y
 CONFIG_NET_UDP_BINDTODEVICE=y
 CONFIG_NFILE_DESCRIPTORS=8
@@ -102,6 +108,7 @@ CONFIG_NSH_TELNETD_CLIENTSTACKSIZE=3072
 CONFIG_NXPLAYER_HTTP_STREAMING_SUPPORT=y
 CONFIG_NXPLAYER_MAINTHREAD_STACKSIZE=3072
 CONFIG_PATH_INITIAL="/mnt/sd0/bin"
+CONFIG_PREALLOC_MQ_MSGS=32
 CONFIG_PREALLOC_TIMERS=4
 CONFIG_RAM_SIZE=1572864
 CONFIG_RAM_START=0x0d000000