diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 49ea483..f125fb8 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -96,6 +96,7 @@
 	const char *select_unittests;	/* Unit test to run */
 	bool handle_signals;		/* Handle signals within sandbox */
 	bool autoboot_keyed;		/* Use keyed-autoboot feature */
+	bool disable_eth;		/* Disable Ethernet devices */
 
 	/* Pointer to information for each SPI bus/cs */
 	struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index 568738c..1c522e3 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -344,4 +344,20 @@
  */
 int sandbox_load_other_fdt(void **fdtp, int *sizep);
 
+/**
+ * sandbox_set_eth_enable() - Enable / disable Ethernet
+ *
+ * Allows control of whether Ethernet packets are actually send/received
+ *
+ * @enable: true to enable Ethernet, false to disable
+ */
+void sandbox_set_eth_enable(bool enable);
+
+/**
+ * sandbox_eth_enabled() - Check if Ethernet is enabled
+ *
+ * Returns: true if Ethernet is enabled on sandbox, False if not
+ */
+bool sandbox_eth_enabled(void);
+
 #endif