diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Posix/main_networking.c b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Posix/main_networking.c
index 8fde5343f5..42563624dd 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Posix/main_networking.c
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Posix/main_networking.c
@@ -135,6 +135,7 @@ static UBaseType_t ulNextRand;
 
 void main_tcp_echo_client_tasks( void )
 {
+    BaseType_t xResult;
     const uint32_t ulLongTime_ms = pdMS_TO_TICKS( 1000UL );
 
     /*
@@ -157,8 +158,6 @@ void main_tcp_echo_client_tasks( void )
     /* Initialise the network interface.*/
     FreeRTOS_debug_printf( ( "FreeRTOS_IPInit\r\n" ) );
 
-    memcpy( ipLOCAL_MAC_ADDRESS, ucMACAddress, sizeof( ucMACAddress ) );
-
     #if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 )
         extern NetworkInterface_t * pxLibslirp_FillInterfaceDescriptor( BaseType_t xEMACIndex,
                                                                         NetworkInterface_t * pxInterface );
@@ -173,12 +172,14 @@ void main_tcp_echo_client_tasks( void )
         }
         #endif /* ( ipconfigUSE_DHCP != 0 ) */
 
-        FreeRTOS_IPInit_Multi();
+        xResult = FreeRTOS_IPInit_Multi();
     #else /* if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
         /* Using the old /single /IPv4 library, or using backward compatible mode of the new /multi library. */
-        FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
+        xResult = FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
     #endif /* if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
 
+    configASSERT( xResult == pdTRUE );
+
     /* Start the RTOS scheduler. */
     FreeRTOS_debug_printf( ( "vTaskStartScheduler\n" ) );
     vTaskStartScheduler();
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/main_networking.c b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/main_networking.c
index 60e5ca3640..dd96450601 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/main_networking.c
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/main_networking.c
@@ -140,6 +140,7 @@ static UBaseType_t ulNextRand;
 
 void main_tcp_echo_client_tasks( void )
 {
+    BaseType_t xReturn;
     const uint32_t ulLongTime_ms = pdMS_TO_TICKS( 1000UL );
 
     /*
@@ -180,12 +181,13 @@ void main_tcp_echo_client_tasks( void )
         }
         #endif /* ( ipconfigUSE_DHCP != 0 ) */
 
-        FreeRTOS_IPInit_Multi();
+        xReturn = FreeRTOS_IPInit_Multi();
     #else /* if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
         /* Using the old /single /IPv4 library, or using backward compatible mode of the new /multi library. */
-        FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
+        xReturn = FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
     #endif /* defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
 
+    configASSERT( xReturn == pdTRUE );
 
     /* Start the RTOS scheduler. */
     FreeRTOS_debug_printf( ( "vTaskStartScheduler\n" ) );
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo/main.c b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo/main.c
index eeeb0a88e6..62ba4277f5 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo/main.c
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo/main.c
@@ -189,6 +189,7 @@ NetworkInterface_t * pxWinPcap_FillInterfaceDescriptor( BaseType_t xEMACIndex,
 
 int main( void )
 {
+    BaseType_t xReturn;
     const uint32_t ulLongTime_ms = pdMS_TO_TICKS( 1000UL );
 
     /*
@@ -314,7 +315,9 @@ int main( void )
     }
     #endif /* ( mainNETWORK_UP_COUNT >= 3U ) */
 
-    FreeRTOS_IPInit_Multi();
+    xReturn = FreeRTOS_IPInit_Multi();
+
+    configASSERT( xReturn == pdTRUE );
 
     /* Start the RTOS scheduler. */
     FreeRTOS_debug_printf( ( "vTaskStartScheduler\r\n" ) );
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_UDP_Mode_CLI_Windows_Simulator/main.c b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_UDP_Mode_CLI_Windows_Simulator/main.c
index 1f7ff80b92..1626361c4a 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_UDP_Mode_CLI_Windows_Simulator/main.c
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_UDP_Mode_CLI_Windows_Simulator/main.c
@@ -130,6 +130,7 @@ static UBaseType_t ulNextRand;
 
 int main( void )
 {
+    BaseType_t xResult;
     const uint32_t ulLongTime_ms = 250UL;
 
     /* Create a mutex that is used to guard against the console being accessed
@@ -157,13 +158,15 @@ int main( void )
             xEndPoints[ 0 ].bits.bWantDHCP = pdTRUE;
         }
         #endif /* ( ipconfigUSE_DHCP != 0 ) */
-        memcpy( ipLOCAL_MAC_ADDRESS, ucMACAddress, sizeof( ucMACAddress ) );
-        FreeRTOS_IPInit_Multi();
+
+        xResult = FreeRTOS_IPInit_Multi();
     #else /* if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
         /* Using the old /single /IPv4 library, or using backward compatible mode of the new /multi library. */
-        FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
+        xResult = FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
     #endif /* defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
 
+    configASSERT( xResult == pdTRUE );
+
     /* Initialise the logging. */
     uint32_t ulLoggingIPAddress;
 
diff --git a/FreeRTOS-Plus/VisualStudio_StaticProjects/FreeRTOS+TCP/plus_tcp_hooks_winsim.c b/FreeRTOS-Plus/VisualStudio_StaticProjects/FreeRTOS+TCP/plus_tcp_hooks_winsim.c
index 2529592cac..92d08fc5d7 100644
--- a/FreeRTOS-Plus/VisualStudio_StaticProjects/FreeRTOS+TCP/plus_tcp_hooks_winsim.c
+++ b/FreeRTOS-Plus/VisualStudio_StaticProjects/FreeRTOS+TCP/plus_tcp_hooks_winsim.c
@@ -228,7 +228,7 @@ void vPlatformInitIpStack( void )
             xEndPoints[ 0 ].bits.bWantDHCP = pdTRUE;
         }
         #endif /* ( ipconfigUSE_DHCP != 0 ) */
-        memcpy( ipLOCAL_MAC_ADDRESS, ucMACAddress, sizeof( ucMACAddress ) );
+
         xResult = FreeRTOS_IPInit_Multi();
     #else /* if defined( ipconfigIPv4_BACKWARD_COMPATIBLE ) && ( ipconfigIPv4_BACKWARD_COMPATIBLE == 0 ) */
         /* Using the old /single /IPv4 library, or using backward compatible mode of the new /multi library. */