diff --git a/examples/nip_addr.c b/examples/nip_addr.c
index b6aa8a5..00f5cc6 100644
--- a/examples/nip_addr.c
+++ b/examples/nip_addr.c
@@ -96,7 +96,7 @@ int main(int argc, char **argv_input)
 	argv++;
 	memset(dev, 0, ARRAY_LEN);
 	ret = sscanf(*argv, "%s", dev);
-	if (strncmp(dev, "wlan", NAME_WLAN_LEN) && strncmp(dev, "eth", NAME_ETH_LEN)) {
+	if (strncmp(dev, "wlan", NAME_WLAN_LEN)) {
 		printf("unsupport addr cfg cmd-1, cmd=%s.\n", dev);
 		cmd_help();
 		return -1;
diff --git a/examples/nip_lib.h b/examples/nip_lib.h
index a32dfe7..43c64f8 100644
--- a/examples/nip_lib.h
+++ b/examples/nip_lib.h
@@ -39,8 +39,8 @@
 #define DEMO_INPUT_3  4
 #define DEMO_INPUT_4  5
 
-/* Eth0 and wlan0 are optional. Change the value based on the actual interface */
-#define NIC_NAME "eth0"
+/* Change the value based on the actual interface */
+#define NIC_NAME "wlan0"
 
 #define BUFLEN          2048
 #define LISTEN_MAX      3
diff --git a/examples/nip_route.c b/examples/nip_route.c
index 46b9d01..47f56bd 100644
--- a/examples/nip_route.c
+++ b/examples/nip_route.c
@@ -134,7 +134,7 @@ int main(int argc, char **argv_input)
 	argv++;
 	memset(dev, 0, ARRAY_LEN);
 	ret = sscanf(*argv, "%s", dev);
-	if (strncmp(dev, "wlan", NAME_WLAN_LEN) && strncmp(dev, "eth", NAME_ETH_LEN)) {
+	if (strncmp(dev, "wlan", NAME_WLAN_LEN)) {
 		printf("unsupport route cfg cmd-3, cmd=%s.\n", dev);
 		cmd_help();
 		return -1;