diff --git a/boards/arm/cxd56xx/spresense/configs/rndis/defconfig b/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
index f0a222a8224..91ab248d3e4 100644
--- a/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/rndis/defconfig
@@ -97,7 +97,6 @@ CONFIG_NET_BROADCAST=y
 CONFIG_NET_ETH_PKTSIZE=1514
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
diff --git a/boards/arm/cxd56xx/spresense/configs/rndis_composite/defconfig b/boards/arm/cxd56xx/spresense/configs/rndis_composite/defconfig
index d78a8088d03..de3e964d160 100644
--- a/boards/arm/cxd56xx/spresense/configs/rndis_composite/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/rndis_composite/defconfig
@@ -99,7 +99,6 @@ CONFIG_NET_BROADCAST=y
 CONFIG_NET_ETH_PKTSIZE=1514
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
diff --git a/boards/arm/cxd56xx/spresense/configs/rndis_smp/defconfig b/boards/arm/cxd56xx/spresense/configs/rndis_smp/defconfig
index ba138d0bb4f..83dcb662917 100644
--- a/boards/arm/cxd56xx/spresense/configs/rndis_smp/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/rndis_smp/defconfig
@@ -97,7 +97,6 @@ CONFIG_NET_BROADCAST=y
 CONFIG_NET_ETH_PKTSIZE=1514
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
diff --git a/boards/arm/kinetis/freedom-k28f/configs/nshsdusb/defconfig b/boards/arm/kinetis/freedom-k28f/configs/nshsdusb/defconfig
index aa71f4ced27..7f8fce251e0 100644
--- a/boards/arm/kinetis/freedom-k28f/configs/nshsdusb/defconfig
+++ b/boards/arm/kinetis/freedom-k28f/configs/nshsdusb/defconfig
@@ -51,7 +51,6 @@ CONFIG_NETUTILS_TELNETD=y
 CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_SOCKOPTS=y
 CONFIG_NET_STATISTICS=y
diff --git a/boards/arm/lc823450/lc823450-xgevk/configs/krndis/defconfig b/boards/arm/lc823450/lc823450-xgevk/configs/krndis/defconfig
index e438103f017..e8dd9d05401 100644
--- a/boards/arm/lc823450/lc823450-xgevk/configs/krndis/defconfig
+++ b/boards/arm/lc823450/lc823450-xgevk/configs/krndis/defconfig
@@ -100,7 +100,6 @@ CONFIG_NET_BROADCAST=y
 CONFIG_NET_ETH_PKTSIZE=1500
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
diff --git a/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig b/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
index a5f00cb7cb9..66e46be8875 100644
--- a/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
+++ b/boards/arm/lc823450/lc823450-xgevk/configs/rndis/defconfig
@@ -97,7 +97,6 @@ CONFIG_NET_BROADCAST=y
 CONFIG_NET_ETH_PKTSIZE=1514
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_PKT=y
 CONFIG_NET_ROUTE=y
diff --git a/boards/arm/nrf52/nrf52840-dk/configs/composite/defconfig b/boards/arm/nrf52/nrf52840-dk/configs/composite/defconfig
index 44a99b01595..4db42c1d9ab 100644
--- a/boards/arm/nrf52/nrf52840-dk/configs/composite/defconfig
+++ b/boards/arm/nrf52/nrf52840-dk/configs/composite/defconfig
@@ -47,7 +47,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/nrf52/nrf52840-dk/configs/rndis/defconfig b/boards/arm/nrf52/nrf52840-dk/configs/rndis/defconfig
index ceac5ee77d4..517e8e62430 100644
--- a/boards/arm/nrf52/nrf52840-dk/configs/rndis/defconfig
+++ b/boards/arm/nrf52/nrf52840-dk/configs/rndis/defconfig
@@ -43,7 +43,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/nrf53/nrf5340-dk/configs/composite_cpuapp/defconfig b/boards/arm/nrf53/nrf5340-dk/configs/composite_cpuapp/defconfig
index ff4eb68866c..0cabfc2b6d6 100644
--- a/boards/arm/nrf53/nrf5340-dk/configs/composite_cpuapp/defconfig
+++ b/boards/arm/nrf53/nrf5340-dk/configs/composite_cpuapp/defconfig
@@ -45,7 +45,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/nrf53/thingy53/configs/composite_cpuapp/defconfig b/boards/arm/nrf53/thingy53/configs/composite_cpuapp/defconfig
index 4f0e27f7fd2..d8b97b3084a 100644
--- a/boards/arm/nrf53/thingy53/configs/composite_cpuapp/defconfig
+++ b/boards/arm/nrf53/thingy53/configs/composite_cpuapp/defconfig
@@ -45,7 +45,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/stm32/stm32f4discovery/configs/composite/defconfig b/boards/arm/stm32/stm32f4discovery/configs/composite/defconfig
index ecb7a136d00..7ae85c119eb 100644
--- a/boards/arm/stm32/stm32f4discovery/configs/composite/defconfig
+++ b/boards/arm/stm32/stm32f4discovery/configs/composite/defconfig
@@ -55,7 +55,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/stm32/stm32f4discovery/configs/rndis/defconfig b/boards/arm/stm32/stm32f4discovery/configs/rndis/defconfig
index 52c295d8afa..0fa2449d30b 100644
--- a/boards/arm/stm32/stm32f4discovery/configs/rndis/defconfig
+++ b/boards/arm/stm32/stm32f4discovery/configs/rndis/defconfig
@@ -53,7 +53,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/stm32f7/nucleo-144/configs/f722-composite/defconfig b/boards/arm/stm32f7/nucleo-144/configs/f722-composite/defconfig
index 43d010d350e..a3c1c962003 100644
--- a/boards/arm/stm32f7/nucleo-144/configs/f722-composite/defconfig
+++ b/boards/arm/stm32f7/nucleo-144/configs/f722-composite/defconfig
@@ -49,7 +49,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/stm32h7/nucleo-h743zi/configs/composite/defconfig b/boards/arm/stm32h7/nucleo-h743zi/configs/composite/defconfig
index f1020d72f10..f63c62e1553 100644
--- a/boards/arm/stm32h7/nucleo-h743zi/configs/composite/defconfig
+++ b/boards/arm/stm32h7/nucleo-h743zi/configs/composite/defconfig
@@ -55,7 +55,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/arm/stm32h7/nucleo-h743zi/configs/rndis/defconfig b/boards/arm/stm32h7/nucleo-h743zi/configs/rndis/defconfig
index 42d7d5a220b..ba9a2041d9e 100644
--- a/boards/arm/stm32h7/nucleo-h743zi/configs/rndis/defconfig
+++ b/boards/arm/stm32h7/nucleo-h743zi/configs/rndis/defconfig
@@ -49,7 +49,6 @@ CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_LOOPBACK=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
diff --git a/boards/sim/sim/sim/configs/usbdev/defconfig b/boards/sim/sim/sim/configs/usbdev/defconfig
index c246e2bed60..0c793c679dc 100644
--- a/boards/sim/sim/sim/configs/usbdev/defconfig
+++ b/boards/sim/sim/sim/configs/usbdev/defconfig
@@ -52,7 +52,6 @@ CONFIG_NET_ETH_PKTSIZE=1518
 CONFIG_NET_ICMP=y
 CONFIG_NET_ICMP_SOCKET=y
 CONFIG_NET_IPFORWARD=y
-CONFIG_NET_LL_GUARDSIZE=50
 CONFIG_NET_NAT=y
 CONFIG_NET_TCP=y
 CONFIG_NET_UDP=y