diff --git a/lcpng_interface.c b/lcpng_interface.c
index b7e542a..c6563fa 100644
--- a/lcpng_interface.c
+++ b/lcpng_interface.c
@@ -861,16 +861,43 @@ lcp_itf_pair_replace_end (void)
 static clib_error_t *
 lcp_itf_phy_add (vnet_main_t *vnm, u32 sw_if_index, u32 is_create)
 {
-  vnet_hw_interface_t *hw;
+  vnet_hw_interface_t *hi;
+  index_t lipi;
   uword is_sub;
 
   is_sub = vnet_sw_interface_is_sub (vnm, sw_if_index);
-  hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
-
-  LCP_ITF_PAIR_INFO ("phy_add: phy:%U hw:%U is_sub:%u is_create:%u",
+  LCP_ITF_PAIR_INFO ("phy_%s: phy:%U is_sub:%u", is_create?"add":"del",
 		     format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index,
-		     format_vnet_sw_if_index_name, vnet_get_main (), hw->sw_if_index,
-		     is_sub, is_create);
+		     is_sub);
+  if (is_sub) {
+    vnet_sw_interface_t *si;
+    si = vnet_get_sw_interface (vnm, sw_if_index);
+    LCP_ITF_PAIR_INFO ("phy_%s: si:%U parent:%U", is_create?"add":"del",
+		     format_vnet_sw_if_index_name, vnet_get_main (), si->sw_if_index,
+		     format_vnet_sw_if_index_name, vnet_get_main (), si->sup_sw_if_index
+		     );
+  }
+
+  hi = vnet_get_hw_interface_or_null (vnm, sw_if_index);
+  if (hi) {
+    LCP_ITF_PAIR_INFO ("phy_%s: hi:%U is_sub:%u", is_create?"add":"del",
+		     format_vnet_sw_if_index_name, vnet_get_main (), hi->sw_if_index,
+		     is_sub);
+  }
+
+  lipi = lcp_itf_pair_find_by_phy (sw_if_index);
+  if (lipi != INDEX_INVALID) {
+    lcp_itf_pair_t *lip;
+    vnet_sw_interface_t *si;
+
+    lip = lcp_itf_pair_get (lipi);
+    si = vnet_get_sw_interface_or_null (vnm, lip->lip_host_sw_if_index);
+    if (!si) {
+      LCP_ITF_PAIR_INFO ("phy_%s: si:%U is_sub:%u", is_create?"add":"del",
+		     format_vnet_sw_if_index_name, vnet_get_main (), si->sw_if_index,
+		     is_sub);
+    }
+  }
 
   return NULL;
 }