diff --git a/eth_interface.c b/eth_interface.c
index 33e48f0..c3b84b3 100644
--- a/eth_interface.c
+++ b/eth_interface.c
@@ -212,7 +212,10 @@ bool ethinf_get_link_state(EthInterface *intf) {
 void ethinf_up(EthInterface *intf) {
     intf->up = true;
 
-    // TODO: check PHY link state
+    // trigger a link change interrupt to query link state
+    if (intf->ioDef->llTrigLinkChg != NULL) {
+        intf->ioDef->llTrigLinkChg(intf->ioDef);
+    }
 }
 
 void ethinf_down(EthInterface *intf) {
diff --git a/eth_interface.h b/eth_interface.h
index dec04d0..cf07233 100644
--- a/eth_interface.h
+++ b/eth_interface.h
@@ -22,6 +22,7 @@ typedef struct EthIODef_ {
     int (*llTxTrigger)(struct EthIODef_ *io, MsgQueue *mq);                             ///< Function pointer to low-level transmit function trigger
     int (*llTxDone)(struct EthIODef_ *io, const RawPckt *rawPckt);                      ///< Transmission done (interrupt) callback
     int (*llLinkChg)(struct EthIODef_ *io, int linkState, uint16_t speed, bool duplex); ///< Link change interrupt
+    int (*llTrigLinkChg)(struct EthIODef_ *io);                                         ///< Trigger a link change interrupt callback
     int (*llRxStore)(struct EthIODef_ *io, const RawPckt *rawPckt);                     ///< Receive done callback
     int (*llError)(struct EthIODef_ *io, int error);                                    ///< Low-level error interrupt
     int (*llRxRead)(struct EthIODef_ *io);                                              ///< Read received packets