diff --git a/eth_interface.c b/eth_interface.c
index b4c0010..3c9af03 100644
--- a/eth_interface.c
+++ b/eth_interface.c
@@ -96,9 +96,10 @@ static ThreadReturnType task_ethintf(ThreadParamType param) {
         } break;
         case ETH_IIE_LINK_CHG_NOTIFY: {
             bool ls = event_data;
-            ethinf_set_link_state(intf, ls);
+            bool prev_ls = ethinf_get_link_state(intf); // get previous link state
+            ethinf_set_link_state(intf, ls); // set new link state
 
-            if (intf->dhcp != NULL) {
+            if ((intf->dhcp != NULL) && (ls != prev_ls)) { // no double start!
                 if (ls) { // if link is on
                     dhcp_start(intf->dhcp);
                 } else { // if link is off