diff --git a/pkg/daemon/ovs.go b/pkg/daemon/ovs.go
index 7af13f65461..7ba6e0a3462 100644
--- a/pkg/daemon/ovs.go
+++ b/pkg/daemon/ovs.go
@@ -61,6 +61,7 @@ func configureGlobalMirror(portName string, mtu int) error {
 	}
 
 	if !nicExist {
+		klog.Infof("nic %s not exist, create it", portName)
 		raw, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", portName, "--",
 			"set", "interface", portName, "type=internal", "--",
 			"clear", "bridge", "br-int", "mirrors", "--",
@@ -68,17 +69,18 @@ func configureGlobalMirror(portName string, mtu int) error {
 			"--id=@m", "create", "mirror", fmt.Sprintf("name=%s", util.MirrorDefaultName), "select_all=true", "output_port=@mirror0", "--",
 			"add", "bridge", "br-int", "mirrors", "@m")
 		if err != nil {
-			klog.Errorf("failed to configure mirror nic %s %q", portName, raw)
+			klog.Errorf("failed to configure mirror nic %s, %q, %v", portName, raw, err)
 			return fmt.Errorf(raw)
 		}
 	} else {
+		klog.Infof("nic %s exist, configure it", portName)
 		raw, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", portName, "--",
 			"clear", "bridge", "br-int", "mirrors", "--",
 			"--id=@mirror0", "get", "port", portName, "--",
 			"--id=@m", "create", "mirror", fmt.Sprintf("name=%s", util.MirrorDefaultName), "select_all=true", "output_port=@mirror0", "--",
 			"add", "bridge", "br-int", "mirrors", "@m")
 		if err != nil {
-			klog.Errorf("failed to configure mirror nic %s %q", portName, raw)
+			klog.Errorf("failed to configure mirror nic %s, %q, %v", portName, raw, err)
 			return fmt.Errorf(raw)
 		}
 	}
diff --git a/pkg/daemon/ovs_linux.go b/pkg/daemon/ovs_linux.go
index 2b941f4d111..c4831ff91ae 100644
--- a/pkg/daemon/ovs_linux.go
+++ b/pkg/daemon/ovs_linux.go
@@ -917,11 +917,13 @@ func (c *Controller) patchNodeExternalGwLabel(key string, enabled bool) error {
 func configureMirrorLink(portName string, _ int) error {
 	mirrorLink, err := netlink.LinkByName(portName)
 	if err != nil {
+		klog.Error(err)
 		return fmt.Errorf("can not find mirror nic %s: %v", portName, err)
 	}
 
 	if mirrorLink.Attrs().OperState != netlink.OperUp {
 		if err = netlink.LinkSetUp(mirrorLink); err != nil {
+			klog.Error(err)
 			return fmt.Errorf("can not set mirror nic %s up: %v", portName, err)
 		}
 	}
@@ -932,10 +934,12 @@ func configureMirrorLink(portName string, _ int) error {
 func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPConflict bool) error {
 	nodeLink, err := netlink.LinkByName(link)
 	if err != nil {
+		klog.Error(err)
 		return fmt.Errorf("can not find nic %s: %v", link, err)
 	}
 
 	if err = netlink.LinkSetHardwareAddr(nodeLink, macAddr); err != nil {
+		klog.Error(err)
 		return fmt.Errorf("can not set mac address to nic %s: %v", link, err)
 	}
 
@@ -952,6 +956,7 @@ func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPCo
 
 	if nodeLink.Attrs().OperState != netlink.OperUp {
 		if err = netlink.LinkSetUp(nodeLink); err != nil {
+			klog.Error(err)
 			return fmt.Errorf("can not set node nic %s up: %v", link, err)
 		}
 	}
@@ -960,6 +965,7 @@ func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPCo
 	ipAddMap := make(map[string]netlink.Addr)
 	ipAddrs, err := netlink.AddrList(nodeLink, unix.AF_UNSPEC)
 	if err != nil {
+		klog.Error(err)
 		return fmt.Errorf("can not get addr %s: %v", nodeLink, err)
 	}
 	for _, ipAddr := range ipAddrs {
@@ -987,6 +993,7 @@ func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPCo
 	for ip, addr := range ipDelMap {
 		klog.Infof("delete ip address %s on %s", ip, link)
 		if err = netlink.AddrDel(nodeLink, &addr); err != nil {
+			klog.Error(err)
 			return fmt.Errorf("delete address %s: %v", addr, err)
 		}
 	}
@@ -1012,6 +1019,7 @@ func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPCo
 
 		klog.Infof("add ip address %s to %s", ip, link)
 		if err = netlink.AddrAdd(nodeLink, &addr); err != nil {
+			klog.Error(err)
 			return fmt.Errorf("can not add address %v to nic %s: %v", addr, link, err)
 		}
 	}