increse quantity of dhcp tries

modules/Ethernet/netconf.c

@@ -23,7 +23,7 @@
 #include <string.h>
 
 
-#define MAX_DHCP_TRIES 3
+#define MAX_DHCP_TRIES 12
 
 #define TIME_COUNTER_10_MIN   600
 #define TIME_COUNTER_1_MIN    60