diff --git a/net/neighbor/neighbor_add.c b/net/neighbor/neighbor_add.c
index 02cf8f6f96..b3fc738c96 100644
--- a/net/neighbor/neighbor_add.c
+++ b/net/neighbor/neighbor_add.c
@@ -76,10 +76,17 @@ void neighbor_add(FAR net_ipv6addr_t ipaddr, FAR struct neighbor_addr_s *addr)
   int     oldest_ndx;
   int     i;
 
-  nlldbg("Add neighbor: %02x:%02x:%02x:%02x:%02x:%02x\n",
-         addr->na_addr.ether_addr_octet[0], addr->na_addr.ether_addr_octet[1],
-         addr->na_addr.ether_addr_octet[2], addr->na_addr.ether_addr_octet[3],
-         addr->na_addr.ether_addr_octet[4], addr->na_addr.ether_addr_octet[5]);
+  nlldbg("Add neighbor: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+         ntohs(ipaddr[0]), ntohs(ipaddr[1]), ntohs(ipaddr[2]),
+         ntohs(ipaddr[3]), ntohs(ipaddr[4]), ntohs(ipaddr[5]),
+         ntohs(ipaddr[6]), ntohs(ipaddr[7]));
+  nlldbg("  at: %02x:%02x:%02x:%02x:%02x:%02x\n",
+         addr->na_addr.ether_addr_octet[0],
+         addr->na_addr.ether_addr_octet[1],
+         addr->na_addr.ether_addr_octet[2],
+         addr->na_addr.ether_addr_octet[3],
+         addr->na_addr.ether_addr_octet[4],
+         addr->na_addr.ether_addr_octet[5]);
 
   /* Find the first unused entry or the oldest used entry. */
 
@@ -94,7 +101,7 @@ void neighbor_add(FAR net_ipv6addr_t ipaddr, FAR struct neighbor_addr_s *addr)
           break;
         }
 
-      if (net_ipv6addr_cmp(g_neighbors[i].ne_ipaddr, addr))
+      if (net_ipv6addr_cmp(g_neighbors[i].ne_ipaddr, ipaddr))
         {
           oldest_ndx = i;
           break;
diff --git a/net/neighbor/neighbor_findentry.c b/net/neighbor/neighbor_findentry.c
index 30b13038cc..782b105157 100644
--- a/net/neighbor/neighbor_findentry.c
+++ b/net/neighbor/neighbor_findentry.c
@@ -44,6 +44,7 @@
 #include <nuttx/config.h>
 
 #include <string.h>
+#include <debug.h>
 
 #include "neighbor/neighbor.h"
 
@@ -71,13 +72,29 @@ FAR struct neighbor_entry *neighbor_findentry(net_ipv6addr_t ipaddr)
 {
   int i;
 
+  nlldbg("Find neighbor: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+         ntohs(ipaddr[0]), ntohs(ipaddr[1]), ntohs(ipaddr[2]),
+         ntohs(ipaddr[3]), ntohs(ipaddr[4]), ntohs(ipaddr[5]),
+         ntohs(ipaddr[6]), ntohs(ipaddr[7]));
+
   for (i = 0; i < CONFIG_NET_IPv6_NCONF_ENTRIES; ++i)
     {
-      if (net_ipv6addr_cmp(g_neighbors[i].ne_ipaddr, ipaddr))
+      FAR struct neighbor_entry *neighbor = &g_neighbors[i];
+
+      if (net_ipv6addr_cmp(neighbor->ne_ipaddr, ipaddr))
         {
+          nlldbg("  at: %02x:%02x:%02x:%02x:%02x:%02x\n",
+                 neighbor->ne_addr.na_addr.ether_addr_octet[0],
+                 neighbor->ne_addr.na_addr.ether_addr_octet[1],
+                 neighbor->ne_addr.na_addr.ether_addr_octet[2],
+                 neighbor->ne_addr.na_addr.ether_addr_octet[3],
+                 neighbor->ne_addr.na_addr.ether_addr_octet[4],
+                 neighbor->ne_addr.na_addr.ether_addr_octet[5]);
+
           return &g_neighbors[i];
         }
     }
 
+  nlldbg("  Not found\n");
   return NULL;
 }